Page 4 of 400

ContentsSafety and Security...........................  53
Occupant safety...................................  54
Airbags ...........................................  55
Seat belts .......................................  60
Children in the vehicle ....................  63
Blocking of rear door window 
operation ........................................  70
Panic alarm* ........................................  71
Activating .......................................  71
Deactivating ...................................  71
Driving safety systems .........................  72
ABS ................................................  72
BAS ................................................  73
ESP .................................................  74
Four wheel electronic traction 
system (4MATIC) with the ESP .......  77
Anti-theft systems................................  78
Immobilizer.....................................  78
Anti-theft alarm system* ................  78
Tow-away alarm* ...........................  79
Controls in detail...............................  81
Locking and unlocking .........................  82
SmartKey .......................................  82
Opening the doors from 
the inside .......................................  85
Opening the trunk ..........................  86
Closing the trunk............................  87
Trunk lid emergency release ..........  88
Separately locking the trunk ..........  89
Separately unlocking the trunk ......  90
Automatic central locking ..............  90
Locking and unlocking from 
the inside .......................................  91
Seats ...................................................  92
Easy-entry/exit feature* ................  92
Removing and installing front seat 
head restraints ...............................  93
Rear seat head restraints ...............  94
Multicontour seat* .........................  97
Heated seats* ................................  98
Memory function* ...............................  99
Storing positions into memory .....  100
Recalling positions from memory .  100
Storing exterior rear view mirror 
parking position ...........................  101Lighting .............................................  102
Exterior lamp switch ....................  102
Combination switch .....................  105
Hazard warning flasher ................  106
Interior lighting ............................  107
Door entry lamps .........................  108
Trunk lamp ...................................  108
Instrument cluster .............................  109
Instrument cluster illumination ....  109
Coolant temperature display........  110
Trip odometer ..............................  111
Tachometer ..................................  111
Outside temperature indicator .....  111
Control system ..................................  113
Multifunction display....................  113
Multifunction steering wheel........  114
Menus ..........................................  116
Standard display menu ................  118
AUDIO menu ................................  118
NAVI* menu .................................  121
Malfunction memory menu ..........  122
Settings menu ..............................  123
Trip computer menu.....................  136
TEL menu* ...................................  138 
     
        
        Page 25 of 400
25 At a glance
Center console
Center console
Upper part
Item
Page
1
Seat heater*, driver’s side
98
2
Rear window sunshade 
switch
152
3
ESP control switch
74
4
Hazard warning flasher 
switch – switching on/off
106
5
Central locking switch
91
6
Rear seat head restraints 
switch
95
7
Anti-theft alarm system 
indicator lamp
78
Tow-away alarm switch
79
Item
Page
8
Seat heater*, passenger 
side
98
9
PASS. AIRBAG OFF 
indicator lamp
66,
279
a
Audio system,
or
173
COMAND* (see separate 
operating instructions)
b
Climate control
154
Automatic climate control*
162
Rear window defroster
153 
     
        
        Page 30 of 400
30 Getting startedUnlocking
The “Getting started” section provides an 
overview of the vehicle’s most basic func-
tions. First-time Mercedes-Benz owners 
should pay special attention to the infor-
mation given here.
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 
references are located at the end of each 
segment.
Unlocking
Unlocking with the SmartKeySmartKey with remote control 1‹Lock button
2ŠOpening button for the trunk lid
3ŒUnlock button
4ÂPanic button* (
page 71)
Press unlock buttonŒ on the 
SmartKey.
All turn signal lamps flash once. The 
locking knobs in the doors move up.
Get in the vehicle and insert the 
SmartKey in the starter switch.
For more information, see “Locking and 
unlocking” (
page 82).
iCanada only:
Only vehicles equipped with an 
anti-theft alarm system* have 
SmartKeys with integrated panic 
button*4. 
     
        
        Page 53 of 400
53 Safety and Security
Occupant safety
Panic alarm*
Driving safety systems
Anti-theft systems 
     
        
        Page 71 of 400
71 Safety and Security
Panic alarm*
Panic alarm*
An audible alarm and flashing exterior 
lamps will operate for approximately 
21/2minutes.
1Âbutton
Activating
Press and hold button1 for at least 
one second. 
Deactivating
Press button1 again.
or
Insert SmartKey in starter switch.
iCanada only:
Only vehicles equipped with an 
anti-theft alarm system* have 
SmartKeys with integrated panic 
button1.
iFor 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 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 78 of 400

78 Safety and SecurityAnti-theft systems
Anti-theft systemsImmobilizer
The immobilizer prevents unauthorized 
persons from starting your vehicle.
Activating
Removing the SmartKey from the 
starter switch activates the 
immobilizer.
Deactivating
Inserting the SmartKey in the starter 
switch 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
the trunk lid
the hood
The alarm will stay on, even if the 
activating element (a door, for example) is 
immediately closed.
The alarm system will also be triggered 
when
someone attempts to raise the vehicle
opening the vehicle with the 
mechanical keyArming the alarm system
The alarm system is armed after locking 
the vehicle with the SmartKey. The turn 
signal lamps flash three times to indicate 
that the alarm system is activated. A red 
indicator lamp in the switch for the 
tow-away alarm (
page 79) begins to 
flash after approx. ten seconds after 
arming the alarm system.
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).
iIf the alarm stays on for more than 
20 seconds, an emergency call is 
initiated automatically by the Tele Aid 
system* (
page 223) provided 
Tele Aid service was subscribed to and 
properly activated, and that necessary 
cellular service and GPS coverage are 
available. 
     
        
        Page 79 of 400

79 Safety and Security
Anti-theft systems
Disarming the alarm system
The alarm system is disarmed when you 
unlock your vehicle with the SmartKey. The 
turn signal lamps flash once to indicate 
that the alarm system is deactivated.
Canceling the alarm
To cancel the alarm:
Insert the SmartKey in the starter 
switch.
or
Press theŒ or‹ button on the 
SmartKey.
Tow-away alarm*
Once the tow-away alarm is armed, a visual 
and audible alarm will be triggered when 
someone attempts to raise the vehicle.
iIf the turn signal lamps do not flash 
three times, one of the following 
elements may not be properly closed:
a door
the trunk lid
Close the respective element and lock 
the vehicle again.
iThe alarm system will rearm automati-
cally after approximately 40 seconds if 
no door or the trunk lid was opened.
iThe tow-away protection alarm is 
triggered, for example, if the vehicle is 
lifted on one side.
If the alarm stays on for more than 
20 seconds, an emergency call is 
initiated automatically by the Tele Aid 
system* (
page 223) provided 
Tele Aid service was subscribed to and 
properly activated, and that necessary 
cellular service and GPS coverage are 
available. 
     
        
        Page 80 of 400
80 Safety and SecurityAnti-theft systemsArming 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 
automatically.
Disarming tow-away alarm
To prevent triggering the tow-away alarm, 
switch off the tow-away alarm feature 
before 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 
console.
1Tow-away alarm off switch
2Indicator lamp
Switch off the ignition and remove the 
SmartKey.
Press upper switch position1.
Indicator lamp2 in switch comes on 
briefly.
Exit and lock your vehicle with the 
SmartKey.
The tow-away alarm remains disarmed 
until you lock your vehicle again.
Canceling the alarm
To cancel the alarm:
Insert the SmartKey in the starter 
switch.
or
Press theŒ or‹ button on the 
SmartKey.
iYou cannot disarm the tow-away alarm 
while the ignition is switched on.