
Central locking 
Automatic  ................................ 74, 138
KEYLESS-GO  .................................... 71
Locking/unlocking from inside  ........75
SmartKey  ......................................... 70
Central locking/unlocking switch  ..... 75
Certification label  .............................. 360
Children in the vehicle  
Air bags  ........................................... 37
BabySmart™ air bag deactivation
system  ............................................. 46
Child safety locks (rear doors)  .........60
Child seat anchors – LATCH-type  ....59
Indicator lamp, front passenger
front air bag off (Canada only)  .........46
Indicator lamp, front passenger
front air bag off (USA only)  ..............42
Infant and child restraint systems .... 56
OCS (Occupant Classification
System)  ........................................... 42
Override switch  ................................ 60
Safety notes ..................................... 55
Tether anchorage points  ..................58
Top tether  ........................................ 58
Child safety
see Children in the vehicle                        
Child seat anchors – LATCH-type
see Children in the vehicle                        
Chrome-plated exhaust tip,
cleaning  .............................................. 281
Cigarette lighter  ................................ 212
Climate control system  .................... 172
3-zone automatic climate control  ..181
Air conditioning  .....................177, 186
Air conditioning refrigerant  ............371
Air distribution  ....................... 178, 188
Air recirculation mode  ...........180, 190
Air volume  ............................. 179, 189
Automatic mode  ....................178, 187
Climate control  .............................. 175
Deactivating system  ..............177, 185
Front defroster  ...................... 179, 189
Residual heat and
ventilation .............................. 180, 191
Temperature  .......................... 178, 187
Clock  ............................................ 28, 135
Cockpit  ................................................. 27
Cold tire inflation pressure  .............. 255Collapsible wheel chock  ................... 286
COMAND system see separate COMAND system
operating instructions                               
Combination switch  .......................... 100
Comfort submenu  
Easy-entry/exit feature .................. 139
Fold-in function for exterior rear
view mirrors  ................................... 140
Seat belt adjustment feature  .........139
Compass  
Calling up ....................................... 223
Control system  .................................. 125
Multifunction display  .....................127
Multifunction steering wheel  .........125
Resetting to factory settings  ..........132
Control system menus  ...................... 127
Audio/DVD  .................................... 129
Distronic  ........................................ 131
Navigation  ..................................... 130
Off-road  ......................................... 131
Settings  ......................................... 132
Standard display  ............................ 128
Telephone  ...................................... 142
Trip computer  ................................ 141
Vehicle configuration  .....................140
Vehicle status message memory  ...131
Control system submenus  
Comfort  ......................................... 139
Instrument cluster  .........................133
Lighting  .......................................... 136
Time/Date  ..................................... 135
Vehicle  ........................................... 138
Coolant  
Anticorrosion/antifreeze  ...............374
Capacities  ...................................... 369
Checking level  ............................... 231
Messages in the multifunction
display  ........................................... 306
Cruise control  .................................... 144
Activating ....................................... 145
Canceling  ....................................... 146
Changing the set speed  .................146
Last stored speed  ..........................147
Lever .............................................. 145
Messages in the mutlifunction
display  ........................................... 2946IndexX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 6 

Resume function ............................ 147
Setting current speed  ....................145
Cup holders  ........................................ 209
Curb weight  ....................................... 255
Customer Assistance Center (CAC)  ... 23
Customer Relations Department  ....... 23
D
Dashboard see Instrument cluster                              
Data recording  ..................................... 24
Date, Setting  ...................................... 135
Daytime running lamp mode  .............. 99
Switching on or off ......................... 136
Deep water
see Standing water                                   
Defroster  
Rear window  .................................. 191
Windshield  ............................. 179, 189
Delayed shut-off  
Exterior lamps ................................ 137
Interior lighting  .............................. 138
Department of Transportation
see DOT                                                    
Diesel engine  
Preglow indicator lamp  ....................29
Diesel fuel
see Fuel                                                     
Differential locks  ............................... 121
A few words about  .........................122
Messages in the multifunction
display  ................................... 123, 302
Switching  ....................................... 122
Difficulties  
While driving  .................................. 111
With starting  .................................. 110
Digital clock
see Clock                                                  
Digital speedometer  ......................... 129
Dimensions (vehicle) see Vehicle specification                          
Direction of rotation (tires)  .............. 246
Displays  
Digital speedometer  ......................129
Distronic  ........................................ 149
Maintenance service indicator  .......273
Messages in the multifunction
display  ........................................... 287
Multifunction display  .....................127
Outside temperature  .............129, 135
Symbol messages  ..........................299
Text messages  ............................... 288
Trip computer  ................................ 141
Vehicle status message memory  ...131
Vehicle system settings  .................132
Distronic  ............................................ 147
Cleaning system sensor cover  .......278
Control system  .............................. 131
Distance warning function  .............155
Distance warning
lamp  ...................................... 149, 319
Driving with .................................... 153
Menu  ............................................. 150
Messages in the multifunction
display  ........................................... 294
Resume function  ............................ 152
Sensor cover .................................. 278
Speed settings  ............................... 151
Door control panel  .............................. 34
Door handles  ........................................ 34
Doors  
Child safety locks  ............................ 60
Locking/unlocking (KEYLESS-GO)  ...71
Locking/unlocking (SmartKey)  ........70
Messages in the multifunction
display  ........................................... 304
Opening from inside ......................... 74
Remote door unlock (Tele Aid)  .......219
Unlocking (Mechanical key)  ...........323
DOT (Department of
Transportation)  .................................. 255
Downhill Speed Regulation see DSR                                                    
Drinking and driving  ......................... 259
Driving  
Abroad  ........................................... 272
Hydroplaning  ................................. 262
Instructions  ........................... 108, 259
In winter  ........................................ 258
Off-road  ......................................... 262
Problems  ....................................... 111
Safety systems  ................................ 61
Systems  ......................................... 144Index7X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 7 

Through standing water .................262
With Distronic  ................................ 153
Driving and parking  
Safety notes  .................................. 108
Driving off  .................................. 110, 261
Driving safety systems  ....................... 61
4-ETS  ............................................... 64
ABS  .................................................. 62
BAS  .................................................. 63
EBP  .................................................. 63
ESP ®
 ................................................ 63
Driving systems  
Air suspension program  .................159
All-wheel drive (4MATIC) ................ 166
Cruise control  ................................ 144
Distronic  ........................................ 147
Downhill Speed Regulation (DSR)  ..155
Hill-start assist system  ..................155
Off-road driving program  ...............158
Parktronic system  ..........................166
Rear view camera  .......................... 169
Driving tips, automatic
transmission  ...................................... 117
DSR (Downhill Speed Regulation)  .... 155
Messages in the multifunction
display  ........................................... 303
E
Easy-entry/exit feature  .............. 92, 139
EBP (Electronic Brake
Proportioning)  ...................................... 63
Electrical system  
Improper work on or
modifications  ................................... 23
Power outlets ................................. 212
Electrical system (Technical data)
see Vehicle specification                          
Electronic Stability Program
see ESP ®
                                                  
Electronic Traction System
see 4-ETS                                                  
Emergency, in case of  
First aid kit ..................................... 284
Flat tire  .......................................... 336
Hazard warning flasher  ..................101
Roadside Assistance ................ 21, 216
Towing the vehicle  .........................352
Emergency calls  
Tele Aid  .......................................... 215
Emergency engine shutdown  ........... 357
Emergency operations  
Limp-home mode  ........................... 119
Remote door unlock (Tele Aid)  .......219
Emergency Tensioning Device
see ETD                                                     
Emission control  ............................... 272
Information label ............................ 361
System warranties  ...........................20
Engine  
Break-in recommendations  ............226
Cleaning ......................................... 276
Compartment  ................................ 228
Malfunction indicator
lamp  ........................................ 29, 320
Messages in the multifunction
display  ........................................... 306
Number .......................................... 361
Starting  .......................................... 108
Turning off  ..................................... 113
Engine (Technical data)
see Vehicle specification                          
Engine compartment  
Radiator  ......................................... 230
Engine coolant
see Coolant                                               
Engine oil  
Adding  ........................................... 231
Additives  ........................................ 371
Checking level  ............................... 230
Consumption  ................................. 230
Messages in the multifunction
display  ........................................... 308
Oil dipstick ..................................... 230
Recommended engine oils and oil
filter  ............................................... 370
ESP ®
 (Electronic Stability
Program)  .............................................. 63
4-ETS  ............................................... 64
Messages in the multifunction
display  ................................... 289, 300
Off-road ESP ®
 .................................. 65
Trailer stabilization ........................... 65
Warning lamp ................................. 3188IndexX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 8 

Transmission position indicator .....116
Transmission positions  ..................116
Generator
see Alternator                                           
Global locking/unlocking
see Key, SmartKey                                    
Glove box  ........................................... 207
Gross Axle Weight Rating see GAWR                                                 
Gross Trailer Weight
see GTW                                                    
Gross Vehicle Weight
see GVW                                                    
Gross Vehicle Weight Rating
see GVWR                                                 
GTW (Gross Trailer Weight)  .............. 255
GVW (Gross Vehicle Weight)  ............ 255
GVWR (Gross Vehicle Weight
Rating)  ................................................ 255
H
Halogen headlamps see Headlamps                                         
Hard plastic trim items, cleaning  .... 279
Hazard warning flasher  .................... 101
Headlamp cleaning system  .............. 101
Headlamps  
Active Bi-Xenon headlamps  .............97
Adjusting aim  ................................. 333
Automatic headlamp mode  ..............98
Bi-Xenon  .................................. 97, 329
Cleaning lenses  ............................. 277
Cleaning system  ............................ 101
Daytime running lamp mode  ............99
Delayed shut-off  ............................ 137
Halogen  ......................................... 329
High-beam flasher  .........................101
High-beam headlamps  ...................100
Low-beam headlamps  ......................98
Replacing bulbs  ............................. 328
Switch  .............................................. 97
Headliner, cleaning and care of  ....... 280
Head restraints  .................................... 82
Adjustment  ................................ 82, 84
Comfort head restraint  ....................84
NECK-PRO active front head
restraints  ......................................... 53
NECK-PRO active front head
restraints, resetting  .......................325
Heated steering wheel  ........................ 93
Height adjustment  
Seat belt outlet  ................................ 51
Seats  ............................................... 82
Vehicle level control  ......................159
High-beam flasher  ............................. 101
High-beam headlamps  .............. 100, 329
Indicator lamp .................................. 29
Hill-start assist system  ..................... 155
Hinged quarter windows  .................. 106
Hood  ................................................... 228
Messages in the multifunction
display  ........................................... 304
Hooks  ................................................. 201
Horn  ...................................................... 27
HVAC see Climate control system                      
Hydroplaning  ..................................... 262
I
Identification labels  .......................... 360
Identification number, vehicle
(VIN)  ................................................... 361
Ignition  ......................................... 80, 109
Immobilizer  .......................................... 66
Indicator lamps see Lamps, indicator and warning            
Infant and child restraint systems
see Children in the vehicle                        
Inflation pressure
see Tires, Inflation pressure                      
Infrared reflecting windshield  ......... 223
Inside door handle  .............................. 74
Instrument cluster  ............................ 124
Illumination  .................................... 124
Lamps  ............................................ 314
Multifunction display  .....................127
Instrument lighting
see Instrument cluster, Illumination         
Instrument panel
see Instrument cluster                              
Instruments and controls
see Cockpit                                               
10IndexX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 10 

LATCH-type child seat anchorssee Children in the vehicle                        
License plate lamps  
Messages in the multifunction
display  ........................................... 311
Replacing bulbs  ............................. 330
Light alloy wheels, cleaning  ............. 279
Lighter see Cigarette lighter                                 
Lighting  ................................................ 97
Daytime running lamp mode  ............99
Exterior  ............................................ 97
Interior  ........................................... 101
Limp-home mode  .............................. 119
Load index (tires)  ...................... 251, 255
Loading see Vehicle loading                                   
Locator lighting  ................................. 136
Lock button  
Outside door handle (KEYLESS-
GO)  .................................................. 73
Locking the vehicle  
KEYLESS-GO  .................................... 71
Manually  ........................................ 324
SmartKey  ......................................... 70
Loss of  
Key  .................................................. 73
Service and Warranty Information
booklet  .......................................... 360
Low-beam headlamps  ......................... 98
Exterior lamp switch  ........................97
Indicator lamp .................................. 29
Switching on  .................................... 98
LOW RANGE mode  ............................. 120
Messages in the multifunction
display  ........................................... 303
Switching  ....................................... 121
Lubricants  .......................................... 368
Lumbar support  ................................... 87
M
Maintenance  ........................................ 21
Maintenance System  
Service indicator display  ................274
Service indicator message  .............273
Service term exceeded  ..................274
Manual headlamp mode (Low-
beam headlamps)  ................................ 98
Maximum engine speed see Vehicle specification                          
Maximum loaded vehicle weight  ..... 256
Maximum load rating (tires)  ............. 255
Maximum permissible tire
inflation pressure  .............................. 256
Mechanical key  .................................. 323
Media interface  ................................. 207
Memory function  ................................. 96
Menus see Control system menus                       
Minispare wheel
see Spare wheel                                        
Mirrors  .................................................. 93
Auto-dimming rear view mirrors ....... 94
Exterior rear view mirror parking
position  ............................................ 95
Exterior rear view mirrors  ................94
Interior rear view mirror  ...................93
Memory function .............................. 96
Power-folding exterior rear view
mirrors  ............................................. 95
Vanity mirror  .................................. 210
MOExtended system  ......................... 345
MOExtended tires  ..................... 345, 365
MON (Motor Octane Number)  .......... 371
Motor Octane Number see MON                                                   
Multicontour seat  ................................ 90
Multifunction display  ........................ 127
Symbol messages  ..........................299
Text messages  ............................... 288
Vehicle status messages  ...............287
Multifunction display messages  
ABS  ....................................... 288, 300
Active headlamps  .......................... 310
Advanced TPMS ..................... 297, 313
Air bags  ......................................... 291
Air filter .......................................... 309
Air suspension program  .................301
Alternator  .............................. 296, 308
Automatic
transmission  .................................. 296
Battery  ................................... 296, 308
Brake fluid  ..................................... 30012IndexX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 12 

Brake pads ..................................... 299
Coolant  .......................................... 306
Cruise control  ................................ 294
Differential locks  ...................123, 302
Distronic  ........................................ 294
Doors  ............................................. 304
Downhill Speed Regulation (DSR)  ..303
EBP  ................................................ 300
Engine oil  ....................................... 308
ESP ®
 ...................................... 289, 300
Fog lamps  .............................. 310, 312
Front passenger front air bag  ........291
Gas cap .......................................... 309
High-beam lamps  ........................... 311
Hood  .............................................. 304
License plate lamps  .......................311
Light sensor  ................................... 311
Low-beam lamps ............................ 312
LOW RANGE mode ......................... 303
Parking brake  ................................ 300
Parking lamps  ................................ 311
PRE-SAFE ®
 .................................... 290
Reserve fuel  ................................... 309
Reverse lamp  ................................. 310
Side marker lamps  .........................311
SmartKey  ....................................... 304
SmartKey with KEYLESS-GO  ..........304
SRS  ................................................ 301
Tailgate  .......................................... 304
Tail lamps  ...................................... 312
Tele Aid  .......................................... 301
Tire inflation pressure  ............297, 313
Tire pressure monitor  ....................297
Tires  ...................................... 297, 313
Trailer brake lamps  ........................312
Trailer tail lamps  ............................ 312
Trailer turn signal lamps  ................312
Turn signals  ................................... 313
Washer fluid  ................................... 305
Multifunction steering wheel  
Adjustment  ...................................... 91
Buttons  .......................................... 125
Cleaning ......................................... 280
Easy-entry/exit feature  ...........92, 139
Gearshift control  ............................ 118
Heating  ............................................ 93
Memory function .............................. 96
Overview  .......................................... 30N
Navigation menu  ............................... 130
Navigation system see Separate operating instructions         
NECK-PRO active front head
restraints  ............................................. 53
Resetting  ....................................... 325
Nets, parcel  ....................................... 200
Night security illumination  .............. 137
Normal occupant weight  .................. 256
Number, vehicle identification
(VIN)  ................................................... 361
O
Occupant Classification System see OCS (Occupant Classification
System)                                                     
Occupant distribution  ....................... 256
Occupant safety  
Air bags  ........................................... 37
BabySmart™  .................................... 46
Children and air bags  .......................37
Children in the vehicle  .....................55
Child seat anchors – LATCH-type  ....59
Fastening the seat belts ................... 50
Front passenger front air bag off
indicator lamp (Canada
only)  ........................................ 46, 322
Front passenger front air bag off
indicator lamp (USA only)  ........42, 322
Infant and child restraint systems .... 56
Introduction  ..................................... 36
OCS (Occupant Classification
System)  ........................................... 42
PRE-SAFE ®
 ....................................... 52
Seat belts  .................................. 39, 48
OCS (Occupant Classification
System)  ................................................ 42
Self-test  ........................................... 45
Odometer  ........................................... 127
Off-road driving  ................................. 262
Checklist  ............................... 264, 268
Crossing obstacles  ........................267
Driving instructions ........................ 262
Driving on sand  .............................. 267
Driving through water  ....................266
Index13X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 13 

R
Radiator  ..................................... 230, 257
Radio  
Selecting stations  ..........................129
Radio transmitters  ............................ 272
Rain sensor see Intermittent wiping                             
Rear axle oil  ....................................... 369
Rear center console ashtray see Ashtrays                                             
Rear doors  
Child safety locks  ............................ 60
Rear door window  
Override switch  ................................ 60
Rear fog lamp
see Fog lamps                                           
Rear lamps
see Tail lamps                                           
Rear seats
see Seats                                                  
Rear view camera  .............................. 169
Cleaning the camera lens  ..............278
Rear window defroster  ..................... 191
Rear window wiper/washer  ............. 104
Recommended tire inflation
pressure  ..................................... 234, 256
Refilling  
AdBlue ®
 ......................................... 347
Refrigerant, air conditioning  ............ 371
Refueling  ............................................ 226
Regular checks  .................................. 228
Reminder, Seat belt see Seat belts, Telltale                              
Remote control
see Key, SmartKey                                    
Remote door unlock (Tele Aid)  ......... 219
Replacing  
Key  .................................................. 74
Replacing bulbs  ................................. 328
Reporting safety defects  .................... 24
Research Octane Number see RON                                                    
Reserve fuel  
Messages in the multifunction
display  ........................................... 309
Warning lamp  ................................... 29
Reset button  ................................ 28, 124Reset tool (NECK-PRO active front
head restraints)  ................................. 325
Restraint systems see Occupant safety                                 
Rims  ........................................... 256, 365
Roadside Assistance  ................... 21, 216
RON (Research Octane Number)  ..... 371
Rubber parts, cleaning  ...................... 279
Run-flat tires see MOExtended tires                               
S
Safety  
Driving safety systems  .....................61
Occupant safety ............................... 36
Reporting defects  ............................ 24
Safety belts
see Seat belts                                           
Seat belt force limiter  ......................... 52
Seat belts  ............................................. 48
Adjustment function  ........................51
Children in the vehicle  .....................55
Cleaning ......................................... 280
Fastening  ......................................... 50
Height adjustment  ...........................51
Proper use of  ................................... 49
Safety guidelines  ............................. 39
Safety notes ..................................... 48
Telltale  ..................................... 29, 317
Seat heating  ......................................... 90
Seating capacity  ................................ 243
Seats  ..................................................... 82
Adjustment  ...................................... 82
Easy-entry/exit feature  ....................92
Folding (expanding cargo volume) . 201
Heating  ............................................ 90
Memory function .............................. 96
Multicontour seat  ............................ 90
Rear seats ........................................ 87
Ventilation  ....................................... 90
Securing cargo  
Cargo tie-down rings ...................... 200
Selective setting
see Key, SmartKey                                    
Selector lever
see Gear selector lever                             
Index15X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 15 

Capacities fuels, coolants,
lubricants etc.  ................................ 368
Coolant  .......................................... 373
Engine oil additives  ........................371
Engine oils  ..................................... 370
Fuel requirements .......................... 371
Gasoline additives .......................... 372
Identification labels  .......................360
Premium unleaded gasoline  ...........371
Rims and tires  ................................ 365
Spare wheel  ................................... 368
Vehicle specification
GL 350 BlueTEC  ............................. 362
Vehicle specification GL 450  .........362
Vehicle specification GL 550  .........363
Washer and headlamp cleaning
system  ................................... 370, 375
Technical data (dimensions)
see Vehicle specification                          
Technical data (electrical system)
see Vehicle specification                          
Technical data (engine)
see Vehicle specification                          
Technical data (weights)
see Vehicle specification                          
Tele Aid  ............................................... 214
Emergency calls  ............................. 215
Information button  .........................217
Initiating an emergency call
manually  ........................................ 216
Messages in the multifunction
display  ........................................... 301
Remote door unlock  ......................219
Roadside Assistance button  ..........216
Search & Send  ............................... 218
SOS button  .................................... 216
Stolen Vehicle Recovery Services  ..219
System self-test  ............................. 215
Telephone  ............................................. 30
Answering/ending a call  ................143
Hands-free microphone  ...................34
Menu  ............................................. 142
Operation ....................................... 142
Phone book .................................... 143
Redialing  ........................................ 144
Temperature  
Interior temperature  ..............178, 187
Outside  .................................. 129, 135Tether anchorage points
see Children in the vehicle                        
Tie-down rings  ................................... 200
Tightening torque  
Wheels  ........................................... 344
Time setting  ....................................... 135
TIN (Tire Identification Number)  ...... 256
Tire and Loading Information
placard  ............................................... 242
Tire and loading terminology  ........... 254
TIREFIT  ............................................... 337
Tire Identification Number see TIN                                                      
Tire inflation pressure  
Checking ........................................ 237
Important notes on  ........................235
Label on the inside of fuel filler
flap  ................................................ 236
Placard on driver’s door B-pillar  .....242
Tire labeling  ....................................... 250
Tire load rating  .................................. 255
Tire ply composition and material
used  .................................................... 256
Tire pressure loss warning system  . 237
Tire repair kit see TIREFIT                                               
Tires  ........................................... 233, 365
Advanced Tire Pressure
Monitoring System (Advanced
TPMS)  ............................................ 239
Air pressure  ................................... 234
Care and maintenance  ...................247
Cleaning ......................................... 248
Direction of rotation, spinning  .......246
Important notes on tire inflation
pressure  ........................................ 235
Inflation pressure  ..................236, 237
Information placard  .......................242
Inspection  ...................................... 247
Labeling  ......................................... 250
Load index  ............................. 251, 255
Load rating  .................................... 255
Messages in the multifunction
display  ................................... 297, 313
MOExtended  .................................. 365
Ply composition and material
used ............................................... 256Index17X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 17