Page 5 of 521

ContentsSafety and Security...........................  65
Occupant safety...................................  66
Air bags ..........................................  67
Seat belts .......................................  73
Active head restraints ....................  77
Children in the vehicle ....................  78
Blocking of rear door window 
operation ........................................  89
Panic alarm ..........................................  91
Activating .......................................  91
Deactivating ...................................  91
Driving safety systems .........................  92
ABS ................................................  92
BAS ................................................  94
ESP
®..............................................  94
Electrohydraulic brake system .......  97
Four wheel electronic traction 
system (4MATIC) with the ESP
®...  100
Anti-theft systems..............................  101
Immobilizer...................................  101
Anti-theft alarm system ................  101
Tow-away alarm ...........................  103
Controls in detail.............................  105
Locking and unlocking .......................  106
SmartKey .....................................  106
SmartKey with KEYLESS-GO* ......  111
Opening the doors 
from the inside .............................  119
Opening the trunk ........................  120
Closing the trunk..........................  121
Trunk emergency release .............  127
Valet locking ................................  128
Automatic central locking ............  129
Locking and unlocking 
from the inside .............................  129
 Seats ................................................  131
Front seat active head restraints .  131
Rear seat head restraints .............  131
Lumbar support............................  133
Drive - Dynamic seat* with 
multicontour features...................  134
Seat heating* ...............................  135
Seat ventilation* ..........................  136Memory function ...............................  138
Storing positions into memory .....  139
Recalling positions from memory .  139
Storing exterior rear view mirror 
parking position ...........................  140
Lighting .............................................  141
Exterior lamp switch ....................  141
Combination switch .....................  145
Hazard warning flasher ................  146
Interior lighting in the front ..........  147
Door entry lamps .........................  148
Interior lighting in the rear ...........  149
Trunk lamp ...................................  149
Instrument cluster .............................  150
Instrument cluster illumination ....  150
Coolant temperature indicator .....  151
Trip odometer ..............................  151
Tachometer ..................................  152
Outside temperature indicator .....  152 
     
        
        Page 30 of 521
29 At a glance
Overhead control panel
Overhead control panel
Item
Page
1
Rear interior lighting on/off
147
2
Automatic interior lighting
147
3
Front interior lighting on/off
147
4
Temperature sensor 
5
Right reading lamp on/off
147
6
Tilt/sliding sunroof* or 
tilt/sliding panel*
236,
239
7
Tele Aid (emergency call 
system) button
286
Item
Page
8
Rear view mirror
197
9
Reading lamps
147
a
Garage door opener
293
b
Tow-away alarm button
103
c
Ambient lighting
172
d
Interior lighting
e
Left reading lamp on/off
147 
     
        
        Page 35 of 521

34 Getting startedThe “Getting started” section provides an 
overview of the vehicle’s most basic 
functions.
If you are already familiar with the basic 
functions described here, the “Controls in 
detail” section will provide you with further 
information. The corresponding page refer-
ences are located at the end of each seg-
ment.Unlocking
Unlocking with the SmartKeySmartKey with remote control 1‹Lock button
2ŠUnlock button for trunk
3ŒUnlock button
4ÂPanic button (
page 91)
Press unlock button Œ on the 
SmartKey.
All turn signal lamps flash once.
An acoustic signal sounds once 
(if equipped and feature activated).
For more information, see “Factory 
setting” (
page 108).
The locking knobs in the doors 
move up.
The anti-theft alarm system is dis-
armed.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey from the starter switch, take it 
with you, and lock the vehicle. Do not leave 
children unattended in the vehicle, or with 
access to an unlocked vehicle. Unsuper-
vised use of vehicle equipment may cause 
an accident and/or serious personal injury. 
     
        
        Page 36 of 521

35 Getting started
Unlocking
Get in the vehicle and insert the 
SmartKey in the starter switch.
For more information, see “Locking and 
unlocking” (
page 106). 
Unlocking with KEYLESS-GO*
With the KEYLESS-GO function, you can 
lock and unlock the vehicle without using 
the remote control buttons on the 
SmartKey and start the engine without in-
serting the SmartKey in the starter switch.
Pull an outside door handle.
All turn signal lamps flash once.
An acoustic signal sounds once 
(if equipped and feature activated).
For more information, see “Factory 
setting” (
page 114).
The locking knobs in the doors 
move up.
The anti-theft alarm system is dis-
armed.
Get in the vehicle.
For more information, see “SmartKey with 
KEYLESS-GO*” (
page 111).
iThe electrohydraulic brake system is 
activated (
page 97).
iTo unlock the vehicle, the SmartKey 
with KEYLESS-GO must be outside the 
vehicle, no further than approximately 
3 feet (1 meter) away from the door. Warning!
G
When leaving the vehicle, always take the 
SmartKey with KEYLESS-GO with you, and 
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an 
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident 
and/or serious personal injury.
iThe electrohydraulic brake system is 
activated (
page 97). 
     
        
        Page 65 of 521
64 Getting startedParking and lockingLocking with the SmartKey
After exiting the vehicle, press lock 
button‹ on the SmartKey 
(page 34).
All turn signal lamps flash three 
times.
An acoustic signal sounds three 
times (if equipped and feature acti-
vated).
For more information, see “Factory 
setting” (
page 108).
The locking knobs in the doors 
move down.
The anti-theft alarm system is 
armed.
For more information, see the “Controls in 
detail” section (
page 106).Locking with KEYLESS-GO*
1Lock button
After exiting the vehicle, press lock 
button1 on an outside door handle or 
on the trunk lid.
All turn signal lamps flash three 
times.
An acoustic signal sounds three 
times (if equipped and feature acti-
vated).
For more information, see “Factory 
setting” (
page 114).
The locking knobs in the doors 
move down.
The anti-theft alarm system is 
armed.
For more information, see the “Controls in 
detail” section (
page 111). 
     
        
        Page 66 of 521
65 Safety and Security
Occupant safety
Panic alarm
Driving safety systems
Anti-theft systems 
     
        
        Page 92 of 521

91 Safety and Security
Panic alarm
Panic alarm
An audible alarm and flashing exterior 
lamps will operate for approximately 
2½ minutes.
1Â button
Activating
Press and hold button1 for at least 
1 second. 
Deactivating
Press button1 again.
or
Insert the SmartKey or the SmartKey 
with KEYLESS-GO* in the starter 
switch.
or
Press the KEYLESS-GO* start/stop 
button.
The SmartKey with KEYLESS-GO must 
be inside the vehicle.
iUSA 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 inter-
ference received, including interfer-
ence that may cause undesired 
operation.
Any unauthorized modification to this 
device could void the user’s authority 
to operate the equipment.iCanada only:
This device complies with RSS-210 of 
Industry Canada. Operation is subject 
to the following two conditions:
(1) This device may not cause interfer-
ence, and
(2) this device must accept any inter-
ference received, including interfer-
ence that may cause undesired 
operation of the device.
Any unauthorized modification to this 
device could void the user’s authority 
to operate the equipment. 
     
        
        Page 102 of 521
101 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized 
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter 
switch.
With KEYLESS-GO*
Turn off the engine by means of the 
start/stop button on the gear selector 
lever.
Open the driver’s door.Deactivating
With the SmartKey
Switch on the ignition (
page 36).
With KEYLESS-GO*
Start the engine by means of the 
start/stop button on the gear selector 
lever.
Anti-theft alarm system
Once the alarm system has been armed, a 
visual and audible alarm is triggered when 
someone opens:
a door
the trunk
the hood
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.
iIn case the engine cannot be started 
(yet the vehicle’s battery is charged), 
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).