
1 Contents
IntroductionProduct information  .......................... 7
Operator’s manual  ............................. 8
Where to find it  ................................ 13
Reporting Safety Defects  ................ 15Instruments and controlsInstruments and controls  ............... 18
Door control panel  ....................... 20
Overhead control panel  ............... 21
Dashboard ..................................... 22
Center console  .............................. 24OperationVehicle keys  ...................................... 28
Start lock-out  .................................... 31
General notes on the 
central locking system  ............... 32
Central locking system  ................... 33
Radio frequency and 
infrared remote control  ............... 33
KEYLESS-GO ................................. 36Opening and closing windows 
and sliding / pop-up roof 
from outside  ................................. 43
Panic button  ................................. 45
Mechanical keys  .......................... 45
Doors ................................................. 46
Power closing assist for 
doors and trunk lid  .................... 48
Central locking switch .................... 48
Automatic central locking .............. 50
Emergency unlocking in 
case of accident  .......................... 50
Trunk ..................................................51
Trunk lamp ....................................... 54
Trunk lid release switch  ................ 55
Trunk lid release/close switch  ...... 56
Trunk lid emergency release  ........ 59
Antitheft alarm system ................... 60
Tow-away alarm  ................................ 61
Easy-entry/exit feature  .................. 63
Front seat adjustment ..................... 64
Removal and installation of 
front seat head restraints .......... 68
Lumbar support  ............................... 69Multicontour backrest ..................... 69
Seat heater  ........................................ 71
Seat ventilation system  ................... 74
Rear seat head restraints ................ 76
Power head restraints, rear  ............ 77
Power seats, rear .............................. 78
Power seats, setting passenger 
seat position from rear ............... 80
Seat belts and integrated 
restraint system  .......................... 81
Seat belts ........................................... 81
Seat belt nonusage 
warning system  ........................... 82
BabySmart
TM airbag 
deactivation system  .................... 88
Self-test BabySmart
TM without 
special child seat installed  ......... 88
Supplemental Restraint 
System (SRS)  ............................... 89
Emergency tensioning 
retractor (ETR) ............................. 90
Airbags .............................................. 91 

24 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
Center console1ESP (Electronic Stability Program) control switch, 
see page 280
2ADS (Adaptive Damping System) adjustment switch, 
see page 289
Level control switch for vehicles with ABC (Active 
Body Control), see page 286
3Level control switch for vehicles with Airmatic, 
seepage285
ABC (Active Body Control) control switch, see 
page 284
4Switch for rear seat head restraints, see page 76 
Switch for rear seat head restraints, automatic, 
seepage77
5Hazard warning flasher switch, see page 165
6Central locking switch, see page 48 
Indicator lamp for antitheft alarm system, see 
page 60
7Antitheft Alarm System, see page 60 
Switch for Tow-Away alarm, see page 61
8Parking assist (Parktronic system) deactivation 
switch (optional), see page 291
9Switch for rear window sunshade, see page 193
P68.20-2314-27 

26 Contents – Operation
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
OperationVehicle keys  ...................................... 28
Start lock-out  .................................... 31
General notes on the 
central locking system  ............... 32
Central locking system  ................... 33
Radio frequency and 
infrared remote control  ............... 33
KEYLESS-GO ................................. 36
Opening and closing windows 
and sliding / pop-up roof 
from outside  .................................. 43
Panic button  .................................. 45
Mechanical keys  ........................... 45
Doors .................................................. 46
Power closing assist for 
doors and trunk lid  ..................... 48
Central locking switch  .................... 48
Automatic central locking  .............. 50
Emergency unlocking in 
case of accident  ........................... 50
Trunk ................................................. 51
Trunk lamp  ....................................... 54Trunk lid release switch  ................ 55
Trunk lid release/close switch  ...... 56
Trunk lid emergency release  ........ 59
Antitheft alarm system ................... 60
Tow-away alarm  ................................ 61
Easy-entry/exit feature  .................. 63
Front seat adjustment ..................... 64
Removal and installation of 
front seat head restraints .......... 68
Lumbar support  ............................... 69
Multicontour backrest  .................... 69
Seat heater ......................................... 71
Seat ventilation system  ................... 74
Rear seat head restraints  ................ 76
Power head restraints, rear  ........... 77
Power seats, rear  ............................. 78
Power seats, setting passenger 
seat position from rear  .............. 80
Seat belts and integrated 
restraint system  ...........................81
Seat belts  ...........................................81
Seat belt nonusage 
warning system  .......................... 82BabySmart
TM airbag 
deactivation system  .................... 88
Self-test BabySmart
TM without 
special child seat installed  ......... 88
Supplemental Restraint 
System (SRS)  ............................... 89
Emergency tensioning 
retractor (ETR) ............................. 90
Airbags .............................................. 91
Safety guidelines for the 
seat belt, emergency 
tensioning retractor 
and airbag  .................................... 97
Infant and child 
restraint systems ......................... 99
Steering wheel adjustment  .......... 102
Rear view mirrors  .......................... 103
Memory function  ........................... 108
Key dependent 
memory settings  ........................ 111
Instrument cluster  ..........................112
Multifunction steering wheel, 
multifunction display  ................118 

32 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
General notes on the central locking system
If the electronic key is inserted in the starter switch, the 
vehicle cannot be locked or unlocked with the remote 
control.
If the vehicle cannot be locked or unlocked:
•Aim transmitter eye at a receiver on either front 
door handle. Check the batteries of the electronic 
key, see page 371, or synchronize the remote 
control, see page 373.
•Use the mechanical key to unlock the vehicle. To 
start engine, insert the electronic key in the starter 
switch. There could be a slight delay until the 
electronic key can be turned in the starter switch.
•Vehicles with KEYLESS-GO only:
A KEYLESS-GO-card must be recognized by the 
system as being outside the vehicle to enable the 
vehicle to be locked or unlocked (maximum distance 
between card and doors or trunk is approx. 3 ft. 
(1 m). Check the location of the KEYLESS-GO-card, 
see page 36. Check the batteries of the KEYLESS-
GO-card, see page 374. The trunk lid will open 
automatically if a KEYLESS-GO card is detected in 
the trunk, see page 36.Note:
If neither the remote control nor KEYLESS-GO system 
functions, use the mechanical key to unlock or lock the 
vehicle. To start engine, insert the electronic key in the 
starter switch. There could be a slight delay until the 
electronic key can be turned in the starter switch.
Important!
When unlocking the driver’s door with the mechanical 
key, the exterior lamps will flash and the alarm will 
sound.
To cancel the alarm, insert the electronic key in the 
starter switch, or press buttonŒ or‹ on the 
electronic key; or with the optional KEYLESS-GO-
system, when carrying a KEYLESS-GO-card, by grasping 
a door handle or pressing the start- / stop button on the 
gear selector lever. 

45 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Panic button
To activate press and hold button (1) for at least one 
second. An audible alarm and blinking exterior lamps 
will operate for approximately 2
1/2minutes.
To deactivate press button (1) again, or insert electronic 
key in starter switch.Note:
For operation in the USA only: This device complies 
with Part 15 of the FCC Rules. Operation is subject to 
the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, 
including interference that may cause undesired 
operation.
Any unauthorized modification to this device could void 
to the user’s authority to operate the equipment.
Mechanical keys
The mechanical keys work only in driver’s door, trunk, 
and storage compartment locks.
Notes:
The mechanical key does not operate the central locking 
system or antitheft alarm system.
The fuel filler flap cannot be locked or unlocked with 
the mechanical key.
If the fuel filler flap cannot be opened, see page 376.
P80.35-2035-26
1 

46 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Doors
1Opening – pull handle
2Unlocking driver’s door
3Locking driver’s door
Important!
The mechanical key does not operate the central locking 
system or antitheft alarm system.4Individual door from inside:
Push lock button down to lock.
5Front door from inside:
Pull handle to unlock.
When you lock the driver’s door with the mechanical 
key, the door lock button should move down.
Each individual door must be locked with the respective 
door lock button – the driver’s door can only be locked 
when it is closed.
2
1
3
P80.30-2154-26 

47 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index If the vehicle has previously been locked from the 
outside, opening a door from the inside will trigger the 
alarm. When opening a front door while the central 
locking system is in the:
•selective unlocking mode, only that individual door 
is unlocked. The remaining doors, the trunk and 
fuel filler flap remain locked.
•global unlocking mode, all doors, the trunk and fuel 
filler flap are unlocked.
Notes:
In case of a malfunction in the central locking system 
the doors can be locked and unlocked individually.
To lock, push down lock buttons or turn mechanical key 
in driver’s door lock to position 3. In addition lock the 
trunk.
To unlock, pull inside door handles or turn mechanical 
key in driver’s door lock to position 2.Rear doors can only be opened from inside by first 
pulling up the door lock button.
When unlocking the driver’s door with the mechanical 
key, the exterior lamps will flash and the alarm will 
sound.
To cancel the alarm, insert the electronic key in the 
starter switch or press buttonŒ or‹ on the 
electronic key. 

49 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Important!
When the driver’s door is open and the central locking 
switch activated, the complete vehicle is locked after 
closing driver’s door.
If the vehicle was previously locked with the central 
locking switch, while in the selective remote control 
mode, only the door opened from the inside is unlocked.
If the vehicle was previously locked with the central 
locking switch, while in the global remote control mode, 
the complete vehicle is unlocked when a door is opened 
from the inside.
Notes:
If the vehicle was previously locked with the remote 
control or the lock button at any door handle (vehicles 
with KEYLESS-GO), the doors and trunk cannot be 
unlocked with the central locking switch.
The fuel filler flap cannot be locked or unlocked with 
the central locking switch.If the vehicle has previously been locked from the 
outside, opening a door from the inside will trigger the 
alarm. To cancel the alarm, insert the electronic key in 
the starter switch or press buttonŒ or‹ on the 
electronic key; or (vehicles with KEYLESS-GO) when 
carrying the KEYLESS-GO-card, grasp the door handle 
or press the start- / stop button on the gear selector lever.
Wa r n i n g !
When leaving the vehicle always remove the 
electronic key from the starter switch, take the 
KEYLESS-GO-card (if so equipped) with you, and 
lock your vehicle. Do not leave children unattended 
in the vehicle, or with access to an unlocked 
vehicle. Unsupervised use of vehicle equipment 
may cause serious personal injury.