
1, 2, 3 ...
115V AC Socket  ................................. 213
3-zone automatic climate control see Climate control system                      
4-ETS (Electronic Traction System)  ... 64
4MATIC see All-wheel drive (4MATIC)                    
A
ABS (Antilock Brake System)  ............. 62
Indicator lamp ................................ 315
Messages in the multifunction
display  ................................... 288, 300
Accessory weight  .............................. 254
Accidents  ........................................... 112
Air bags  ........................................... 37
Distance warning function  .............155
Emergency calls (Tele Aid)  .............215
NECK-PRO active front head
restraints   ........................................ 53
Active Bi-Xenon headlamps
Messages in the multifunction
display  ........................................... 310
see Headlamps                                         
Adaptive Damping System
see ADS                                                    
AdBlue ®
 ...................................... 346, 373
Capacity, AdBlue ®
 tank  ................. 369
Refilling   ......................................... 347
Additives  
Engine oil  ....................................... 371
Gasoline ......................................... 372
Address change  ................................... 22
ADS (Adaptive Damping System)  ..... 159
Advanced Tire Pressure
Monitoring System (Advanced
TPMS)  ................................................. 239
Messages in the multifunction
display  ................................... 297, 313
Air bags  ................................................ 37
Emergency call upon deployment  ..215
Front, driver and passenger  .............40
Front passenger front air bag off
indicator lamp (Canada
only)  ........................................ 46, 322
Front passenger front air bag off
indicator lamp (USA only)  ........42, 322
Knee bag .......................................... 40
Messages in the multifunction
display  ........................................... 291
OCS (Occupant Classification
System)  ........................................... 42
Safety guidelines  ............................. 39
Side impact  ...................................... 41
Window curtain  ................................ 42
Air conditioning refrigerant and
lubricant  ............................................. 371
Air distribution  .......................... 178, 188
Air filter  .............................................. 309
Air pressure see Tire inflation pressure                        
Air pressure (tires)  ............................ 255
Air recirculation mode  .............. 180, 190
Air suspension program  
Comfortable driving style  ...............159
Introduction  ................................... 159
Messages in the multifunction
display  ........................................... 301
Sporty driving style  ........................159
Suspension tuning  .........................159
Vehicle level control  ......................159
Air volume  ................................. 179, 189
Alarm system see Anti-theft systems                              
Alignment bolt (vehicle tool
kit)  .............................................. 284, 343
All-wheel drive (4MATIC)  .................. 166
Alternator  
Messages in the multifunction
display  ................................... 296, 308
Alternator (Technical data)
see Vehicle specification                          
Anticorrosion/antifreeze  .................. 374
Antilock Brake System see ABS                                                     
Anti-theft systems  ............................... 66
Anti-theft alarm system  ...................66
Immobilizer  ...................................... 66
Aquaplaning
see Hydroplaning                                      
Armrest, front  
Storage compartment  ....................2084IndexX164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 4 

Ashtrays ............................................. 211
Aspect ratio (tires)  ............................ 255
Audio/DVD menu  .............................. 129
Auto-dimming rear view mirrors  ........ 94
Automatic central locking  .......... 74, 138
Automatic headlamp mode  ................ 98
Automatic interior lighting control  .. 101
Automatic locking when driving  ...... 138
Automatic transmission  ................... 114
Emergency operation (limp-home
mode)  ............................................ 119
Gear range indicator  ......................118
Gear ranges  ................................... 118
Gear selector lever  ........................114
Hill-start assist system  ..................155
Kickdown  ....................................... 117
One-touch gearshifting  ..................118
Shifting procedure  .........................116
Steering wheel gearshift control  ....118
Towing a trailer  .............................. 118
Transmission position indicator  .....116
Transmission positions  ..................116
AUX socket  ........................................ 207
Axle oils  .............................................. 369
B
BabySmart™  
Air bag deactivation system  .............46
Self-test  ........................................... 47
Backrest
see Seats                                                  
Backup lamps  
Messages in the multifunction
display  ........................................... 310
Bar (air pressure unit)  ....................... 255
BAS (Brake Assist System)  ................. 63
Batteries, SmartKey  
Checking condition  ..........................73
Replacing  ....................................... 326
Battery, Vehicle  ................................. 348
Charging  ........................................ 350
Jump starting  ................................. 350
Messages in the multifunction
display  ................................... 296, 308
Bead (tire)  .......................................... 255
Beverage holders see Cup holders                                        
Bleeding the fuel system (diesel
engine)  ............................................... 345
BlueTEC  
AdBlue ®
 tank  ................................. 346
AdBlue ®
 tank capacity  ...................369
Brake fluid  
Checking level  ............................... 233
Messages in the multifunction
display  ........................................... 300
Brake lamps  
Cleaning lenses  ............................. 277
Brake pads  
Messages in the multifunction
display  ........................................... 299
Brakes  ................................................ 260
Parking brake  ........................ 112, 261
Warning lamp ................................. 316
Break-in period  .................................. 226
Bug cover (Radiator)  ......................... 230
Bulbs see Replacing bulbs                                  
C
CAC (Customer Assistance Center)  ... 23
California retail buyers and
lessees, important notice for  ............. 21
Calls (phone)  ...................................... 142
Can holders see Cup holders                                        
Capacities and recommended
fuel/lubricants  .................................. 368
Cargo compartment  
Cargo net  ....................................... 206
Cargo volume, expanding  ..............201
Cover blind  .................................... 205
Fuse box  ........................................ 357
Hooks  ............................................ 201
Tie-down rings  ............................... 200
Cargo compartment cover blind  ...... 205
Cargo net  ........................................... 206
Cargo tie-down rings  ......................... 200
Carpets, cleaning  .............................. 280
Carriers  .............................................. 196
Center console  
Lower part  ....................................... 33
Upper part  ....................................... 31
Index5X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 5 

ETD (Emergency Tensioning
Device)  ................................................. 52
Safety guidelines  ............................. 39
Express operation  
Power windows  .............................. 105
Tilt/sliding sunroof  ........................192
Exterior lamp switch  ........................... 97
Exterior rear view mirrors  .................. 94
Fold-in function ........................ 95, 140
Parking position  ............................... 95
Power-folding  ................................... 95
Exterior view of vehicle  ...................... 26
F
Fastening the seat belts  ..................... 50
First aid kit  ......................................... 284
Flat tire  ............................................... 336
Lowering the vehicle  ......................344
Mounting the spare wheel  .............340
Preparing the vehicle  .....................336
Spare wheel ........................... 336, 368
TIREFIT (tire repair kit)  ...................337
Floormats  ........................................... 223
Fluids  
AdBlue ®
 ......................................... 369
Automatic transmission fluid  .........369
Brake fluid  ..................................... 369
Capacities  ...................................... 368
Engine coolant  ............................... 369
Engine oil  ....................................... 369
Power steering fluid  .......................369
Washer and headlamp cleaning
system  ........................................... 370
Fog lamps  ............................................. 99
Messages in the multifunction
display  ................................... 310, 312
Fold-in function for exterior rear
view mirrors  ................................ 95, 140
Four-wheel drive see All-wheel drive (4MATIC)                    
Front air bags
see Air bags                                              
Front axle oil  ...................................... 369
Front lamps see Headlamps                                         
Front passenger front air bag  ............ 40
Messages in the multifunction
display  ........................................... 291
Front passenger front air bag off
indicator lamp (Canada only)  ..... 46, 322
Front passenger front air bag off
indicator lamp (USA only)  .......... 42, 322
Front seat head restraints see Head restraints                                   
Fuel  ..................................................... 226
Additives  ........................................ 372
Capacity, fuel tank  .........................369
Diesel fuel  ............................. 369, 372
Drive sensibly–safe fuel  .................259
Fuel consumption statistics  ...........141
Fuel filler flap and cap  ...................227
Fuel tank reserve warning
lamp  ........................................ 29, 320
Premium unleaded gasoline ... 369, 371
Refueling ........................................ 226
Requirements  ................................ 371
Fuel filler flap  ..................................... 227
Opening manually  ..........................324
Fuels, coolants, lubricants etc.  
Capacities  ...................................... 368
Fuel system, bleeding (diesel
engine)  ............................................... 345
Fuel tank  
Capacity  ........................................ 369
Fuel filler flap and cap  ...................227
Refueling ........................................ 226
Fuses  .................................................. 355
G
Garage door opener  .................... 33, 219
Gasoline see Fuel                                                     
GAWR (Gross Axle Weight Rating)  ... 255
Gear range  ......................................... 118
Indicator  ........................................ 118
Limiting  .......................................... 119
Shifting into optimal  ......................119
Transfer case  ................................. 120
Gear selector lever  ............................ 114
Cleaning ......................................... 280
Gearshift pattern  ........................... 114
Shifting procedure  .........................116
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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 

Interior lighting 
Delayed shut-off  ............................ 138
Emergency lighting  ........................102
Front  .............................................. 101
Front reading lamps  .......................101
Rear  ............................................... 102
Rear reading lamps  ........................102
Interior rear view mirror  ..................... 93
Auto-dimming rear view mirrors ....... 94
Interior storage spaces
see Storage compartments                      
Intermittent wiping  
Rain sensor  .................................... 103
J
Jack  ..................................................... 286
Jump starting  ..................................... 350
K
Key, Mechanical  
Loss of  ............................................. 73
Replacing  ......................................... 74
Unlocking/locking manually  ..........323
Key, SmartKey  
Battery check lamp  ..........................73
Checking batteries  ...........................73
Factory setting ........................... 71, 72
Global locking (KEYLESS-
GO)  .................................................. 73
Global locking (SmartKey) ................ 71
Global unlocking (KEYLESS-
GO)  ............................................ 72, 73
Global unlocking
(SmartKey)  ....................................... 71
Important notes on KEYLESS-GO  .....72
Locking/unlocking ........................... 70
Loss of  ............................................. 73
Messages in the multifunction
display  ........................................... 304
Opening and closing the power
tilt/sliding sunroof  .........................107
Opening and closing the windows . 107
Remote control  ................................ 70
Replacing  ......................................... 74
Replacing batteries  ........................326
Restoring to factory setting  .......71, 73
Selective setting  ........................71, 73
Starter switch positions  ...................80
KEYLESS-GO  
Starter switch positions  ...................80
Kickdown  ........................................... 117
Kilopascal (air pressure unit)  ........... 255
Knee bag  .............................................. 40
L
Labels  
Certification  ................................... 360
Emission control information  .........361
Tire and Loading Information
placard ........................................... 242
Tire inflation pressure  ....................236
Lamps, exterior  
Exterior lamp switch  ........................97
Front  .............................................. 329
Messages in the multifunction
display  ........................................... 310
Rear  ............................................... 329
Switching on/off .............................. 97
Lamps, indicator and warning  
ABS .......................................... 28, 315
Brakes  ..................................... 28, 316
Center console  ................................ 31
Differential locks ............................ 123
Distance warning
lamp  .............................. 149, 155, 319
Engine malfunction  ..................29, 320
ESP ®
 ........................................ 28, 318
Fog lamps  ........................................ 99
Front passenger front air bag off
(Canada only)  .......................... 46, 322
Front passenger front air bag off
(USA only) ................................ 42, 322
Fuel tank reserve  .....................29, 320
High-beam headlamps  .............29, 100
Instrument cluster  ...................28, 314
Low-beam headlamps  ................29, 98
Low tire pressure/TPMS
malfunction telltale  ..................28, 321
Seat belt telltale  ................29, 51, 317
SRS .................................... 29, 36, 318
Turn signals  ..................................... 28
Language, selecting  .......................... 134
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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 

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 

Modifications and alterations,
Operating safety  .............................. 23
Towing  ........................................... 352
Unlocking/locking manually  ..........323
Vehicle configuration menu  ............. 140
Vehicle dimensions see Vehicle specification                          
Vehicle Identification Number
(VIN)  ................................................... 360
Vehicle jack see Jack                                                     
Vehicle level control
see Air suspension program                     
Vehicle lighting  .................................... 97
Vehicle loading  
Cargo tie-down rings ...................... 200
Cargo volume, expanding  ..............201
Carriers  .......................................... 196
Instructions .................................... 194
Load limit  ....................................... 243
Terminology  ................................... 254
Vehicle maximum load on the tire  ... 257
Vehicle specification  
GL 350 BlueTEC  ............................. 362
GL 450  ........................................... 362
GL 550  ........................................... 363
Vehicle status message memory  .... 131
Vehicle tool kit  .................................. 284
Vehicle washing see Vehicle care                                        
Vehicle weights
see Vehicle specification                          
W
Warning lamps see Lamps, Indicator and warning            
Warning sounds  
Distance warning function  .............155
Distronic  ........................................ 149
Driver’s or passenger’s seat belt  .....51
Parking brake  ................................ 300
Parktronic system  ..........................169
Seat belt telltale  ............................ 317
Warranty coverage  ............................ 360
Washer and headlamp cleaning
system  ................................................ 375
Washer fluid  
Messages in the multifunction
display  ........................................... 305
Mixing ratio  .................................... 375
Refilling  .......................................... 232
Washing the vehicle  .......................... 275
Wear pattern (tires)  .......................... 249
Weights (vehicle) see Vehicle specification                          
Wheel  
Changing  ....................................... 336
Removing  ....................................... 343
Spare  ............................................. 336
Tightening torque ........................... 344
Wheels, sizes  ..................................... 365
Wheels, Tires and  .............................. 233
Window curtain air bags  ..................... 42
Windows see Power windows                                  
Windows, cleaning  ............................ 278
Windshield  
Cleaning wiper blades .................... 278
Infrared reflecting  ..........................223
Washer fluid  ................................... 375
Wipers  ........................................... 103
Windshield wipers  
Replacing wiper blades  ..................334
Winter cover  .............................. 230, 257
Winter driving  
Instructions .................................... 258
Radiator cover  ............................... 257
Snow chains  .................................. 258
Tires ............................................... 257
Winter tires  ................................ 257, 365
Wood trims, cleaning  ........................ 280Index19X164_AKB; 5; 31, en-USd2ureepe,Version: 2.11.8.12009-09-11T12:30:16+02:00 - Seite 19