
1, 2, 3 ...
115V AC Socket  ................................. 198
4-ETS see ETS/4-ETS                                          
4MATIC
see All-wheel drive (4MATIC)                    
911 Emergency calls  ........................ 161
A
ABS (Antilock Brake System)  
Indicator lamp ................................ 289
Messages in the multifunction
display  ................................... 271, 272
Accessory weight  .............................. 239
Accidents  ........................................... 101
Air bags  ........................................... 37
Emergency calls (Tele Aid)  .............201
Emergency calls (Telephone)  .........161
NECK-PRO active front head
restraints   ........................................ 51
Active Bi-Xenon headlamps
see Headlamps                                         
Additives  
Engine oil  ....................................... 336
Gasoline ......................................... 337
Address change  ................................... 21
Advanced Tire Pressure
Monitoring System (Advanced
TPMS)  ................................................. 224
Messages in the multifunction
display  ........................................... 268
Air bags  ................................................ 37
Emergency call upon deployment  ..201
Front, driver and passenger  .............40
Front passenger front air bag off
indicator lamp (Canada
only)  ........................................ 45, 297
Front passenger front air bag off
indicator lamp (USA only)  ........42, 298
Messages in the multifunction
display  ........................................... 264
OCS (Occupant Classification
System)  ........................................... 42
Safety guidelines  ............................. 39
Side impact  ...................................... 40
Window curtain  ................................ 41
Air conditioning refrigerant and
lubricant  ............................................. 336
Air distribution  .................................. 181
Air pressure see Tire inflation pressure                        
Air pressure (tires)  ............................ 239
Air pump (electric)  ............................ 315
Air recirculation mode  ...................... 183
Air volume  .......................................... 182
Alarm system see Anti-theft systems                              
All-wheel drive (4MATIC)  .................. 171
Alternator  
Messages in the multifunction
display  ........................................... 281
Alternator (Technical data)
see Vehicle specification                          
Anticorrosion/antifreeze  .................. 338
Anti-theft systems  ............................... 63
Anti-theft alarm system  ...................63
Immobilizer  ...................................... 63
Aquaplaning
see Hydroplaning                                      
Armrest, front  
Storage compartments  ..................193
Armrest, rear  
Storage compartment  ....................193
Ashtrays  ............................................. 196
Aspect ratio (tires)  ............................ 239
Audio menu  ........................................ 115
Audio system  ..................................... 125
Adjusting volume  ........................... 133
Audio and telephone operation  ......125
Audio AUX mode ............................ 154
Bluetooth ®
 settings  ....................... 135
CD mode ........................................ 146
Components  .................................. 126
MP3 mode  ..................................... 146
Operating safety  ............................ 126
Radio operation  ............................. 136
Satellite radio  ................................ 140
Switching on and off  ......................132
System settings  ............................. 135
Telephone  ...................................... 155
Auto-dimming rear view mirrors  ........ 84
Automatic central locking  .......... 70, 124
Automatic headlamp mode  ................ 884IndexX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 4 

Locking/unlocking from inside ........71
SmartKey  ......................................... 66
Central locking/unlocking switch  ..... 71
Certification label  .............................. 328
Children in the vehicle  
Air bags  ........................................... 37
BabySmart™ air bag deactivation
system  ............................................. 45
Child safety locks (rear doors)  .........58
Child seat anchors – LATCH-type
(ISOFIX)  ........................................... 57
Indicator lamp, front passenger
front air bag off (Canada only)  .........45
Indicator lamp, front passenger
front air bag off (USA only)  ..............42
Infant and child restraint systems .... 54
ISOFIX (Child seat anchors –
LATCH-type) ..................................... 57
OCS (Occupant Classification
System)  ........................................... 42
Override switch  ................................ 58
Safety notes ..................................... 53
Tether anchorage points  ..................56
Top tether  ........................................ 56
Child safety
see Children in the vehicle                        
Child seat anchors – LATCH-type
(ISOFIX) see Children in the vehicle                        
Chrome-plated exhaust tip,
cleaning  .............................................. 257
Cigarette lighter  ................................ 197
Clear button  ....................................... 130
Climate control system  .................... 177
Air conditioning  ............................. 179
Air conditioning refrigerant  ............336
Air distribution  ............................... 181
Air recirculation mode  ...................183
Air volume  ..................................... 182
Automatic mode  ............................ 179
Deactivating system  ......................179
Front defroster  .............................. 182
Maximum cooling MAX COOL  ........182
Temperature  .................................. 180
Clock  ............................................ 29, 121
Coat hooks  ......................................... 189
Cockpit  ................................................. 27
Cold tire inflation pressure  .............. 239Collapsible tire (spare wheel)  .......... 333
Collapsible wheel chock  ................... 261
COMAND system see separate COMAND system
operating instructions                               
Combination gauge  ............................. 28
Combination switch  ............................ 90
Compass  ............................................ 199
Control system  .................................. 110
Multifunction display  .....................112
Multifunction steering wheel  .........110
Resetting to factory settings  ..........119
Control system menus  ...................... 113
Audio  ............................................. 115
Navi  ............................................... 115
Service ........................................... 118
Settings  ......................................... 119
Telephone  ...................................... 117
Trip  ................................................ 113
Control system submenus  
Convenience  .................................. 124
Instrument cluster  .........................120
Lighting  .......................................... 122
Time/Date  ..................................... 121
Vehicle  ........................................... 123
Convenience submenu  
Easy-entry/exit feature .................. 124
Fold-in function for exterior rear
view mirrors  ................................... 124
Coolant  
Anticorrosion/antifreeze  ...............338
Capacities  ...................................... 334
Checking level  ............................... 216
Messages in the multifunction
display  ........................................... 279
Temperature gauge ........................ 109
Warning lamp ................................. 295
Coolant temperature gauge  ............... 28
Corner-illuminating lamps  .................. 91
Replacing bulbs  ............................. 304
Cruise control  .................................... 168
Activating ....................................... 169
Canceling  ....................................... 169
Changing the set speed  .................170
Last stored speed  ..........................170
Lever .............................................. 169
Messages in the multifunction
display  ........................................... 2676IndexX204_AKB; 3; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T19:16:58+02:00 - Seite 6 

NECK-PRO active front head
restraints  ......................................... 51
Rear seat head restraints ................. 80
Height adjustment  
Seat belt outlet  ................................ 50
Seats  ............................................... 78
High-beam flasher  ............................... 90
High-beam headlamps  ................ 90, 304
Replacing bulbs  ............................. 304
Hill-start assist system  ..................... 171
Hood  ................................................... 214
Messages in the multifunction
display  ........................................... 277
Hooks  ................................................. 189
Horn  ...................................................... 27
Hydroplaning  ..................................... 246
I
Identification labels  .......................... 328
Identification number, vehicle
(VIN)  ................................................... 329
Ignition  ........................................... 76, 99
Immobilizer  .......................................... 63
Infant and child restraint systems see Children in the vehicle                        
Inflation pressure
see Tires, Inflation pressure                      
Inside door handle  .............................. 70
Instrument cluster  ...................... 28, 108
Illumination  .................................... 109
Lamps  ............................................ 288
Multifunction display  .....................112
Instrument lighting
see Instrument cluster, Illumination         
Instrument panel
see Instrument cluster                              
Instruments and controls
see Cockpit                                               
Interior lighting  
Delayed shut-off  ............................ 123
Emergency lighting  ..........................92
Front  ................................................ 92
Front reading lamps  .........................92
Rear  ................................................. 92
Rear reading lamps  ..........................92
Interior rear view mirror  ..................... 84
Auto-dimming rear view mirrors ....... 84
Interior storage spaces see Storage compartments                      
Intermittent wiping  ............................. 93
Rain sensor  ...................................... 93
ISOFIX (Child seat anchors –
LATCH-type) see Children in the vehicle                        
J
Jack  ..................................................... 261
Jump starting  ..................................... 319
K
Key, Mechanical  
Loss of  ............................................. 69
Replacing  ......................................... 70
Unlocking/locking manually  ..........299
Key, SmartKey  
Battery check lamp  ..........................69
Checking batteries  ...........................69
Factory setting ........................... 67, 69
Global locking (KEYLESS-
GO)  .................................................. 69
Global locking (SmartKey) ................ 67
Global unlocking (KEYLESS-
GO)  .................................................. 69
Global unlocking
(SmartKey)  ....................................... 67
Important notes on KEYLESS-GO  .....68
Locking/unlocking ........................... 66
Loss of  ............................................. 69
Messages in the multifunction
display  ........................................... 277
Opening and closing the
panorama roof  ................................. 97
Opening and closing the windows .... 97
Remote control  ................................ 66
Replacing  ......................................... 70
Replacing batteries  ........................302
Restoring to factory setting  .......67, 69
Selective setting  ........................67, 69
Starter switch positions  ...................76
KEYLESS-GO  
Starter switch positions  ...................76
Kickdown  ........................................... 105
Kilopascal (air pressure unit)  ........... 240
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L
Labels  
Certification  ................................... 328
Emission control information  .........329
Tire and Loading Information
placard ........................................... 227
Tire inflation pressure  ....................220
Lamps, exterior  
Exterior lamp switch  ........................87
Front  .............................................. 304
Messages in the multifunction
display  ........................................... 283
Rear  ............................................... 305
Switching on/off .............................. 87
Lamps, indicator and warning  
ABS .......................................... 28, 289
Brakes  ..................................... 28, 289
Center console  ................................ 31
Coolant  .................................... 28, 295
Engine malfunction  ..................28, 295
ESP ®
 ........................................ 28, 293
Fog lamps  ........................................ 89
Front fog lamps ................................ 28
Front passenger front air bag off
(Canada only)  .......................... 45, 297
Front passenger front air bag off
(USA only) ................................ 42, 298
Fuel tank reserve  .....................28, 294
High-beam headlamps  ...............28, 90
Instrument cluster  ...................28, 288
Low-beam headlamps  ................28, 88
Low tire pressure/TPMS
malfunction telltale  ..................28, 296
Rear fog lamp  .................................. 28
Seat belt telltale  ................28, 50, 292
SRS .................................... 28, 36, 293
Turn signals  ..................................... 28
LATCH-type child seat anchors (ISOFIX)
see Children in the vehicle                        
License plate lamps  
Messages in the multifunction
display  ........................................... 285
Replacing bulbs  ............................. 305
Light alloy wheels, cleaning  ............. 256
Lighter see Cigarette lighter                                 Lighting ................................................ 87
Daytime running lamp mode  ............88
Exterior  ............................................ 87
Interior  ............................................. 92
Limp-home mode  .............................. 108
Load index (tires)  ...................... 235, 240
Loading see Vehicle loading                                   
Locator lighting  ................................. 122
Locking the vehicle  
KEYLESS-GO  .................................... 67
Manually  ........................................ 299
SmartKey  ......................................... 66
Loss of  
Key  .................................................. 69
Service and Warranty Information
booklet  .......................................... 328
Low-beam headlamps  ......................... 88
Exterior lamp switch  ........................87
Replacing bulbs  ............................. 304
Switching on  .................................... 88
Lubricants  .......................................... 334
Lumbar support  ................................... 80
M
Maintenance  ........................................ 20
Maintenance System  
Service indicator display  ................251
Service indicator message  .............250
Service term exceeded  ..................250
Manual headlamp mode (Low-
beam headlamps)  ................................ 88
Maximum engine speed see Vehicle specification                          
Maximum loaded vehicle weight  ..... 240
Maximum load rating (tires)  ............. 240
Maximum permissible tire
inflation pressure  .............................. 240
Mechanical key see Key, Mechanical                                 
Media interface  ................................. 192
Memory function  ........................... 33, 86
Menus see Control system menus                       
Mirrors  .................................................. 83
Auto-dimming rear view mirrors ....... 84
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Exterior rear view mirror parking
position  ............................................ 85
Exterior rear view mirrors  ................84
Interior rear view mirror  ...................84
Memory function .............................. 86
Power-folding exterior rear view
mirrors  ............................................. 85
Vanity mirror  .................................. 196
MON (Motor Octane Number)  .......... 337
Motor Octane Number see MON                                                   
MP3 mode  .......................................... 146
Multifunction display  ........................ 112
Symbol messages  ..........................270
Text messages  ............................... 264
Vehicle status messages  ...............262
Multifunction display messages  
ABS  ....................................... 271, 272
Active headlamps  .......................... 283
Advanced TPMS  ............................. 268
Air bags  ......................................... 264
Alternator  ...................................... 281
Battery  ........................................... 281
Brake fluid  ..................................... 273
Brake pads ..................................... 270
Cargo compartment ....................... 277
Child seat  ...................................... 267
Coolant  .......................................... 279
Corner-illuminating lamps  ..............286
Cruise control  ................................ 267
Doors  ............................................. 277
EBP  ................................................ 272
Engine oil  ....................................... 282
ESP ®
 ............................. 271, 272, 274
Fog lamps  .............................. 283, 285
Front passenger front air bag  ........264
Gas cap .......................................... 282
High-beam lamps  ........................... 284
Hood  .............................................. 277
License plate lamps  .......................285
Light sensor  ................................... 285
Low-beam lamps ............................ 285
Parking brake  ................................ 272
Parking lamps  ................................ 284
Power steering  ............................... 279
Reserve fuel  ................................... 282
Reverse lamp  ................................. 283
Side marker lamps  .........................284SmartKey ....................................... 277
SmartKey with KEYLESS-GO  ..........277
SRS  ................................................ 275
Tailgate  .......................................... 277
Tail lamps  ...................................... 286
Tele Aid  .......................................... 275
Tire inflation pressure  ............268, 288
Tire pressure monitor  ....................268
Tires  ...................................... 268, 288
Trailer brake lamps  ........................286
Trailer tail lamps  ............................ 286
Trailer turn signal lamps  ................287
Turn signals  ................................... 287
Multifunction steering wheel  
Adjustment  ...................................... 82
Buttons  .......................................... 110
Cleaning ......................................... 256
Easy-entry/exit feature  ...........83, 124
Memory function .............................. 86
Overview  .......................................... 29
N
Navigation system see Separate operating instructions         
Navi menu  .......................................... 115
NECK-PRO active front head
restraints  ............................................. 51
Resetting  ....................................... 301
Nets, parcel  ....................................... 188
Normal occupant weight  .................. 240
Number, vehicle identification
(VIN)  ................................................... 329
O
Occupant Classification System see OCS (Occupant Classification
System)                                                     
Occupant distribution  ....................... 240
Occupant safety  
Air bags  ........................................... 37
BabySmart™  .................................... 45
Children and air bags  .......................37
Children in the vehicle  .....................53
Child seat anchors – LATCH-type
(ISOFIX)  ........................................... 57
Fastening the seat belts ................... 49
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Proximity keysee Key, SmartKey                                    
PSI (air pressure unit)  ....................... 240
R
Radio  .................................................. 136
Satellite radio  ................................ 140
Selecting stations  ..........................115
Radio transmitters  ............................ 249
Rain sensor see Intermittent wiping                             
Rear axle oil  ....................................... 334
Rear center console ashtray see Ashtrays                                             
Rear center seat belt  
Unblocking ....................................... 50
Rear doors  
Child safety locks  ............................ 58
Rear door window  
Override switch  ................................ 58
Rear fog lamp
see Fog lamps                                           
Rear lamps
see Tail lamps                                           
Rear seat head restraints
see Head restraints                                   
Rear view camera  .............................. 174
Cleaning the camera lens  ..............254
Rear window defroster  ..................... 184
Rear window wiper/washer  ............... 94
Recommended tire inflation
pressure  ..................................... 219, 240
Refrigerant, air conditioning  ............ 336
Refueling  ............................................ 212
Regular checks  .................................. 213
Reminder, Seat belt see Seat belts, Telltale                              
Remote control
see Key, SmartKey                                    
Remote door lock (Tele Aid)  ............. 205
Remote door unlock (Tele Aid)  ......... 204
Replacing  
Key  .................................................. 70
Replacing bulbs  ................................. 303
Reporting safety defects  .................... 23
Research Octane Number see RON                                                    
Reserve fuel  
Messages in the multifunction
display  ........................................... 282
Warning lamp ................................. 294
Restraint systems
see Occupant safety                                 
Rims  ........................................... 241, 331
Roadside Assistance  ................... 20, 203
Roller sunblinds  ................................. 184
RON (Research Octane Number)  ..... 337
Roof rack  ............................................ 188
Rubber parts, cleaning  ...................... 256
S
Safety  
Driving safety systems  .....................59
Occupant safety ............................... 36
Reporting defects  ............................ 23
Safety belts
see Seat belts                                           
Satellite radio  .................................... 140
Seat belt force limiter  ......................... 51
Seat belts  ............................................. 47
Children in the vehicle  .....................53
Cleaning ......................................... 256
Fastening  ......................................... 49
Height adjustment  ...........................50
Proper use of  ................................... 48
Rear center seat  .............................. 50
Safety guidelines  ............................. 39
Safety notes ..................................... 47
Telltale  ........................................... 292
Seat heating  ......................................... 81
Seating capacity  ................................ 228
Seats  ..................................................... 78
Adjusting  ......................................... 33
Adjustment  ...................................... 78
Easy-entry/exit feature  ....................83
Heating  ............................................ 81
Memory function .............................. 86
Rear seat bench ............................. 189
Securing cargo  
Cargo tie-down rings ...................... 188
Selective setting
see Key, SmartKey                                    
Selector lever
see Gear selector lever                             
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Gasoline additives .......................... 337
Identification labels  .......................328
Premium unleaded gasoline  ...........336
Rims and tires  ................................ 331
Spare wheel  ................................... 333
Vehicle specification GLK 350  .......330
Vehicle specification
GLK 350 4MATIC  ........................... 330
Washer and headlamp cleaning
system  ................................... 335, 339
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  ............................................... 200
Emergency calls  ............................. 201
Information button  .........................203
Initiating an emergency call
manually  ........................................ 202
Messages in the multifunction
display  ........................................... 275
Remote door lock  .......................... 205
Remote door unlock  ......................204
Roadside Assistance button  ..........203
Search & Send  ............................... 204
SOS button  .................................... 202
Stolen Vehicle Recovery Services  ..205
System self-test  ............................. 201
Telephone  .................................... 29, 155
Answering/ending a call  ................117
Call lists  ......................................... 164
Emergency calls “911”  ..................161
Hands-free microphone  ...................32
Making calls ................................... 165
Menu  ............................................. 117
Operation ....................................... 117
Phone book  ........................... 117, 162
Redialing  ........................................ 118
Temperature  
Coolant  .......................................... 109
Interior temperature  ......................180
Outside  .......................................... 110
Tether anchorage points
see Children in the vehicle                        Tie-down rings ................................... 188
Tightening torque  
Wheels  ........................................... 317
Time setting  ....................................... 121
TIN (Tire Identification Number)  ...... 241
Tire and Loading Information
placard  ............................................... 227
Tire and loading terminology  ........... 239
Tire Identification Number see TIN                                                      
Tire inflation pressure  
Checking ........................................ 221
Important notes on  ........................220
Label on the inside of fuel filler
flap  ................................................ 220
Placard on driver’s door B-pillar  .....227
Tire labeling  ....................................... 235
Tire load rating  .................................. 240
Tire ply composition and material
used  .................................................... 241
Tire pressure loss warning system  . 222
Tires  ........................................... 218, 331
Advanced Tire Pressure
Monitoring System (Advanced
TPMS)  ............................................ 224
Air pressure  ................................... 219
Care and maintenance  ...................232
Cleaning ......................................... 233
Direction of rotation, spinning  .......231
Important notes on tire inflation
pressure  ........................................ 220
Inflation pressure  ........................... 221
Information placard  .......................227
Inspection  ...................................... 232
Labeling  ......................................... 235
Load index  ............................. 235, 240
Load rating  .................................... 240
Messages in the multifunction
display  ................................... 268, 288
Ply composition and material
used ............................................... 241
Problems under-/overinflation  ......221
Retreads  ........................................ 218
Rims and tires (technical data)  ......331
Rotation  ......................................... 234
Service life  ..................................... 232
Sizes  .............................................. 331
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Front air bags GObserve Safety notes, see page 37.
Driver’s front air bag : and front passenger
front air bag ; are designed to provide
increased protection for the driver and front
passenger against the risk of injuries to the
head and thorax.
Driver and front passenger front air bags are
deployed
Rin the event of certain frontal impacts
Rif the system determines that air bag
deployment can offer additional protection
to that provided by the seat belt
Rdepending on whether the respective seat
belt is in use
Rindependently of the side impact air bags
and/or the window curtain air bags
The front air bags in this vehicle have been
designed to inflate in two stages. This allows
the air bags to have different rates of inflation.
The rate of inflation is based on the vehicle
deceleration rate as assessed by the air bag
control unit.
Vehicles with OCS, USA only: The front
passenger front air bag deployment is
additionally influenced by the passenger’s
weight category as identified by the Occupant
Classification System (OCS) (Y page 42).
Vehicles with OCS, USA only: The lighter the
front passenger-side occupant, the higher the
vehicle deceleration rate required for second
stage inflation of the front passenger front air
bag.
The air bags will not deploy in impacts which
do not exceed the system’s preset
deployment thresholds. You will then be
protected by the fastened seat belts.
The front air bags will not deploy in the event
of a rollover unless the vehicle’s rate of
longitudinal deceleration or acceleration
exceeds the preset deployment threshold for
the front air bags.
The front passenger front air bag will only be
deployed if
Rvehicles with OCS, USA only: the system,
based on OCS weight sensor readings,
detects that the front passenger seat is
occupied
Rthe 45 indicator lamp in the center
console is not lit (USA only: (Y page 42),
Canada only: (Y page 45))
Rthe impact exceeds a preset deployment
threshold
! Vehicles with BabySmart™ air bag
deactivation system (Canada only): Do not
place objects heavier than 20 lb (9 kg) on
the front passenger seat. This could cause
the front or side impact air bag on the front
passenger side to deploy in a crash which
exceeds the system’s deployment
threshold.
Side impact air bags 
GObserve Safety notes, see page 37.GWarning!
The pressure sensors for side impact air bag
control are located in the doors. Do not
modify any components of the doors or door
trim panels including, for example, the
addition of door speakers.
Improper repair work on the doors or the
modification or addition of components to the
doors create a risk of rendering the side
impact air bags inoperative or causing
unintended air bag deployment. Work on the
doors must therefore only be performed by
40Occupant safetySafety and security
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