Page 22 of 406
19 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index 1Door control panel, see page 20
2Overhead control panel, see page 213Dashboard, see page 22
4Center console, see page 24
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20 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
Door control panel1Door handle, pull to open, see page 37
2Memory function (for storing seat, steering wheel 
and exterior rear view mirror settings), see page 95
3Front seat adjustment switch, see page 49
4Steering wheel adjustment switch, see page 89
5Power window switch, see page 197
6Switch for rear door window override, see page 197 
and 199
7Trunk lid release switch, see page 45
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21 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index Overhead control panel1Interior lighting, see page 203
2Tele Aid cover (emergency call system), see 
page 234
3Sliding / pop-up roof, see page 200
4Hands-free microphone for Tele Aid and optional 
telephone with voice recognition system
5Rear view mirror, see page 90
6Garage door opener, see page 226
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        Page 26 of 406
23 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index 1Hood lock release, see page 318
2Parking brake pedal, see page 260
3Steering wheel adjustment (manual), see page 88
4Parking brake release, see page 260
5Exterior lamp switch, see page 143
6Combination switch, see page 148
7Exterior mirror adjustment switch, see page 91
8Headlamp washer button, see page 147
9Cruise control switch, see page 27210Multifunction steering wheel, see page 102
Horn (with electronic key in starter switch 
position 1 or 2)
11Instrument cluster, see page 98
12Voice recognition system switch, see separate 
operating instructions
13Starter switch, see page 246
14Glove box lid release, see page 208
15Glove box lock, see page 208
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24 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
Center console1Left front seat heater switch, see page 58
2Rear window sunshade switch (optional), see 
page 205 
3ESP (electronic stability program) control switch, 
see page 278
4Hazard warning flasher switch, see page 151
5Central locking switch, see page 39
6Rear seat head restraints switch, see page 60
7Antitheft alarm system, see page 46 
Switch for tow-away protection, see page 47
8Right front seat heater switch, see page 58
9AIRBAG OFF indicator lamp, see page 292
10COMAND system (optional), see separate 
operating instructions, or
audio system, see page 173
11Climate control (C 240), see page 152
Automatic climate control (C 320) see page 160
Rear window defroster, see page 170
P 68.10-2501-27
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25 Instruments and controls
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index 12Ashtray, see page 213
13Automatic transmission, see page 251
or Manual transmission, see page 24914Storage compartment, see page 209
15Armrest, see page 209
Storage compartment, see page 215
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        Page 32 of 406

29 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Electronic key
The electronic key has an integrated radio frequency 
and infrared remote control, plus removable mechanical 
key.
The remote control (1) operates all locks on the vehicle.
The mechanical key (2) works only in the driver’s door, 
trunk, and glove box lock.When using the mechanical key (2) for lock operations, 
it can be removed by sliding it out of the remote control. 
To do so, move locking tab (3) to the right and slide the 
mechanical key (2) in direction of arrow (4).
The remote control transmitter is located in the 
electronic key.
The infrared receivers are located in the front door 
handles.
Note:
Remove the mechanical key from the electronic key 
when using valet parking service. To prevent access to 
trunk or storage compartments lock them separately 
and retain the mechanical key.
See page 41 for separate locking of trunk and page 208 
for locking of glove box.
Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking 
system requiring a special key manufacturing process. 
For security reasons, replacement keys can only be 
obtained from your authorized Mercedes-Benz Center.
P 80.35-2031-26
1
3
4
2
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30 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Start lock-out
Important!
Removing the electronic key from the starter switch 
activates the start lock-out. The engine cannot be 
started.
Inserting the electronic key in the starter switch 
deactivates the start lock-out.
Note:
In case the engine cannot be started (vehicle’s battery is 
in order), the system is not operational. Contact an 
authorized Mercedes-Benz Center or call 1-800-FOR-
MERCedes (in the USA), or 1-800-387-0100 (in Canada).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 of either front door 
handle. Check the batteries of the electronic key, see 
page 357, or synchronize the electronic key, see 
page 359.
•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.
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.
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