Page 5 of 418

ContentsSafety and Security...........................  59
Occupant safety...................................  60
Airbags ...........................................  61
Seat belts .......................................  66
Children in the vehicle....................  69
Blocking of rear window operation .  75
Panic alarm ..........................................  76
Activating .......................................  76
Deactivating ...................................  76
Driving safety systems .........................  77
ABS ................................................  77
BAS ................................................  78
ESP.................................................  79
Anti-theft systems................................  82
Immobilizer.....................................  82
Anti-theft alarm system ..................  82
Tow-away alarm .............................  84
Controls in detail...............................  87
Locking and unlocking .........................  88
SmartKey .......................................  88
SmartKey with KEYLESS-GO* ........  91
Opening the doors from the inside .  96
Opening the trunk lid from the 
outside ...........................................  96
Opening the trunk lid from the 
inside .............................................  97
Closing the trunk lid .......................  98
Trunk lid opening / closing system*  98
Trunk lid emergency release ........  103
Separately locking the trunk lid ...  104
Separately unlocking the trunk lid  104
Power closing assist for doors and 
trunk lid........................................  105
Automatic central locking ............  105
Locking and unlocking from the 
inside ...........................................  106
Seats .................................................  107
Easy-entry / exit feature ...............  107
Removing and installing front seat 
head restraints .............................  108Rear seat head restraints .............  109
Lumbar support ...........................  111
Multicontour backrest*................  111
Seat heating.................................  113
Seat ventilation* ..........................  115
Memory function ...............................  116
Storing positions into memory .....  117
Recalling positions from memory.  117
Storing exterior rear view mirror 
parking position ...........................  117
Lighting .............................................  119
Exterior lamp switch ....................  119
Combination switch .....................  123
Hazard warning flasher ................  123
Interior lighting ............................  124
Courtesy lighting ..........................  125
Instrument cluster .............................  126
Instrument cluster illumination ....  126
Coolant temperature gauge .........  127
Trip odometer ..............................  127
Tachometer..................................  128
Outside temperature indicator .....  128 
     
        
        Page 26 of 418
25 At a glance
Center console
Center console
Upper part
Item
Page
1
Switch for rear window 
sunshade
172
2
Parking assist* (Parktronic 
system) deactivation 
switch
214
3
Active Body Control (ABC)
210
4
Level control switch
211
5
Central locking switch
106
Anti-theft alarm system in-
dicator lamp
82
6
Hazard warning flasher 
on/off switch
123
Item
Page
7
Central unlocking switch
106
8
ESP control switch
80
9
Rear head restraints, 
switch for folding down
109
a
Tow-away alarm switch
84
b
COMAND system, see sep-
arate operating instruc-
tions
c
Automatic climate control
173 
     
        
        Page 60 of 418
59 Safety and Security
Occupant safety
Panic alarm
Driving safety systems
Anti-theft systems 
     
        
        Page 77 of 418
76 Safety and SecurityPanic alarm
Panic alarmAn audible alarm and blinking exterior 
lamps will operate for approximately 
2½ minutes.
1Â button
Activating
Press and hold button1 for at least 
one second. 
Deactivating
Press button1 again.
or
Insert SmartKey in the starter switch.
iFor operation in the USA only: This de-
vice complies with Part 15 of the 
FCC Rules. Operation is subject to the 
following two conditions:
This device may not cause harmful 
interference, and
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. 
     
        
        Page 83 of 418

82 Safety and SecurityAnti-theft systems
Anti-theft systemsImmobilizer
The immobilizer prevents unauthorized 
persons from starting your vehicle.
Activating
With the SmartKey: Removing the 
SmartKey from the starter switch acti-
vates the immobilizer.
With KEYLESS-GO*: Turning off the en-
gine by means of the start/stop button 
on the gear selector lever activates the 
immobilizer.Deactivating
With the SmartKey: Inserting the 
SmartKey in the starter switch deacti-
vates the immobilizer.
With KEYLESS-GO*: Starting the en-
gine by means of the start/stop button 
on the gear selector lever deactivates 
the immobilizer.
Anti-theft alarm system
Once the alarm system has been armed, a 
visual and audible alarm is triggered when 
someone: 
opens a door
opens the trunk
opens the hood
The alarm will stay on even if the activating 
element (a door, for example) is immedi-
ately closed.
The alarm system will also be triggered 
when
someone attempts to raise the vehicle
the vehicle is opened with the 
mechanical key
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). 
     
        
        Page 84 of 418

83 Safety and Security
Anti-theft systems
Arming the alarm system
The alarm system is armed after locking 
the vehicle with the SmartKey or 
KEYLESS-GO*. The turn signal lamps flash 
three times to indicate that the alarm sys-
tem is activated. The indicator lamp in the 
central locking switch (
page 106) will 
flash after approximately ten seconds 
when the alarm system is completely 
armed .Disarming the alarm system
The alarm system is disarmed when you 
unlock your vehicle with the SmartKey or 
KEYLESS-GO*. The turn signal lamps flash 
once to indicate that the alarm system is 
deactivated.Canceling the alarm
To cancel the alarm:
With the SmartKey
Insert the SmartKey in the starter 
switch.
or
Press the Œ or ‹ button on the 
SmartKey.
With KEYLESS-GO*
Grasp the outside door handle.
or
Press the KEYLESS-GO* start/stop 
button.
iIf the alarm stays on for more than 
20 seconds, an emergency call is initi-
ated automatically by the Tele Aid sys-
tem (
page 230) provided Tele Aid 
service was subscribed to and properly 
activated, and that necessary cellular 
service and GPS coverage are avail-
able.
iIf the turn signal lamps do not flash 
three times one of the following ele-
ments may not be properly closed:
a door
the trunk lid
the hood
Close the respective element and lock 
the vehicle again. 
     
        
        Page 85 of 418

84 Safety and SecurityAnti-theft systemsTow-away alarm
Once the tow-away alarm is armed, a visual 
and audible alarm will be triggered when 
someone attempts to raise the vehicle.Arming tow-away alarm
When you lock your vehicle, the tow-away 
alarm is automatically armed after about 
30 seconds.
When you unlock your vehicle, the 
tow-away protection disarms automatical-
ly.
Disarming tow-away alarm
To prevent triggering the tow-away alarm,  
switch off the tow-away alarm feature be-
fore towing the vehicle, or when parking on 
a surface subject to movement, such as a 
ferry or auto train.The switch is located on the center con-
sole.
1Indicator lamp
2Tow-away alarm off switch
Switch off the ignition and remove the 
SmartKey.
iThe tow-away protection alarm is trig-
gered, for example, if the vehicle is lift-
ed on one side.
If the alarm stays on for more than 
20 seconds, an emergency call is initi-
ated automatically by the Tele Aid sys-
tem (
page 230) provided Tele Aid 
service was subscribed to and properly 
activated, and that necessary cellular 
service and GPS coverage are avail-
able.
iYou cannot disarm the tow-away alarm 
if the ignition is switched on. 
     
        
        Page 86 of 418
85 Safety and Security
Anti-theft systems
Press switch2.
Indicator lamp1 in the switch comes 
on briefly.
Exit and lock your vehicle with the 
SmartKey or (vehicles with 
KEYLESS-GO*) the lock button at each 
door handle.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.Canceling tow-away alarm
To cancel the alarm:
With the SmartKey
Insert the SmartKey in the starter 
switch.
or
Press the Œ or ‹ button on the 
SmartKey.With KEYLESS-GO*
Grasp the outside door handle.
or
Press the KEYLESS-GO* start/stop 
button.