Page 5 of 481

Contents
Safety and Security...........................  63
Occupant safety...................................  64
Air bags ..........................................  65
Occupant Classification System .....  70
Seat belts .......................................  75
Active head restraints ....................  79
Children in the vehicle ....................  80
Blocking of rear 
side window operation ...................  86
Panic alarm ..........................................  87
Activating .......................................  87
Deactivating ...................................  87
Driving safety systems .........................  88
ABS ................................................  88
BAS ................................................  90
ESP
®...............................................  91
Anti-theft systems................................  94
Immobilizer.....................................  94
Anti-theft alarm system ..................  94
Controls in detail...............................  97
Locking and unlocking .........................  98
SmartKey .......................................  98
SmartKey with KEYLESS-GO* ......  101
Checking the batteries in 
the SmartKey or 
SmartKey with KEYLESS-GO* ......  107
Loss of the SmartKey or 
SmartKey with KEYLESS-GO* ......  107
Opening the doors 
from the inside .............................  108
Opening the trunk ........................  109
Closing the trunk..........................  111
Trunk emergency release .............  116
Valet locking ................................  117
Automatic central locking ............  118
Locking and unlocking 
from the inside .............................  118
Seats .................................................  120
Front seat active head restraints .  120
Rear seat head restraints .............  120
Multicontour seat* .......................  123
Seat heating* ...............................  124
Seat ventilation* ..........................  125Memory function ...............................  126
Storing positions into memory .....  127
Recalling positions from memory.  127
Lighting .............................................  128
Exterior lamp switch ....................  128
Combination switch .....................  132
Corner-illuminating front 
fog lamps* (With Bi-Xenon*
headlamps only)...........................  133
Hazard warning flasher ................  135
Interior lighting ............................  136
Door entry lamps .........................  137
Trunk lamp ...................................  137
Instrument cluster .............................  138
Adjusting 
instrument cluster illumination ....  138
Coolant temperature indicator .....  139
Resetting trip odometer ...............  139
Tachometer..................................  140
Clock............................................  140
Outside temperature indicator .....  140
Control system ..................................  141
Multifunction display....................  141
Multifunction steering wheel........  142
Menus ..........................................  144
Standard display menu ................  146 
     
        
        Page 30 of 481
29 At a glance
Center console
Center console
Upper partItemPage
1Seat heater*, driver’s side
Seat ventilation*, driver’s 
side124
125
2Parktronic system* deacti-
vation switch (Canada only)260
3Rear window sunshade* 
switch (Canada only)182
4ESP® control switch91
5Hazard warning flasher 
on/off switch135
6Central unlocking switch
Central locking switch119
119
7Switch for folding down rear 
seat head restraints121
8Anti-theft alarm system 
indicator lamp94
ItemPage
9Seat heater*, 
passenger side
Seat ventilation*, 
passenger side124
125
aFront passenger front air 
bag off indicator lamp 74,
366
bAudio system,
or
COMAND* (see separate 
operating instructions)147
cClimate control
Automatic climate control
Rear window defroster 184
194
183 
     
        
        Page 35 of 481
34 Getting started
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 SmartKey
SmartKey with remote control 
1‹Lock button
2ŠOpening button for trunk
3ŒUnlock button
4ÂPanic button (
page 87)
Press unlock button Œ on the 
SmartKey.
All turn signal lamps flash once.
An acoustic signal sounds once.
For more information, see “Factory 
setting” (
page 104).
The locking knobs in the doors 
move up.
The anti-theft alarm system is dis-
armed.
Enter the vehicle and insert the 
SmartKey in the starter switch. 
     
        
        Page 36 of 481

35 Getting started
Unlocking
For more information, see “SmartKey” 
(
page 98).
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.
For more information, see “Factory 
setting” (
page 104).
The locking knobs in the doors 
move up.
The anti-theft alarm system is dis-
armed.
Enter the vehicle.
For more information, see “SmartKey with 
KEYLESS-GO*” (
page 101).
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. A child’s 
unsupervised access to a vehicle could 
result in an accident and/or serious 
personal injury.
iOpening a door causes the windows on that 
side of the car to open slightly. They will return to 
the up position when the door is closed.
iTo unlock the vehicle, the SmartKey with 
KEYLESS-GO must be outside the vehicle, no fur-
ther than approx. 3 feet (1 meter) away from the 
door to be opened.
Warning!G
When leaving the vehicle, always remove the 
SmartKey with KEYLESS-GO from the start-
er switch, take it with you, and lock the vehi-
cle. Do not leave children unattended in the 
vehicle, or with access to an unlocked vehi-
cle. A child’s unsupervised access to a 
vehicle could result in an accident and/or 
serious personal injury.
iOpening a door causes the windows on that 
side of the car to open slightly. They will return to 
the up position when the door is closed. 
     
        
        Page 63 of 481

62 Getting started
Parking and locking
Exit the vehicle, take the SmartKey or 
the SmartKey with KEYLESS-GO* with 
you, and close all doors and the trunk 
lid.
Locking with the SmartKey
Press lock button‹on the 
SmartKey (
page 34).
With the trunk and both doors closed:
All turn signal lamps flash three 
times.
An acoustic signal sounds three 
times.
For more information, see “Factory 
setting” (
page 104).
The locking knobs in the doors 
move down.
The anti-theft alarm system is 
armed.
For more information, see “SmartKey” 
(
page 98).
Locking with KEYLESS-GO*
1Lock button
Press lock button1 on an outside 
door handle.
With the trunk and both doors closed:
All turn signal lamps flash three 
times.
An acoustic signal sounds three 
times.
For more information, see “Factory 
setting” (
page 104).
The locking knobs in the doors 
move down.
The anti-theft alarm system is 
armed.
For more information, see “SmartKey with 
KEYLESS-GO*” (
page 101).
iIf you hear a warning signal you have 
forgotten to switch off the headlamps before 
opening the driver’s door.
In addition the message 
Turn off lamps 
appears in the multifunction display. Vehicles 
with KEYLESS-GO*, this message is only dis-
played for approximately 1 second. It is then 
overwritten by the message, 
Please do not 
forget key
.
Switch off the headlamps.
iOpening a door causes the windows on that 
side of the car to open slightly. They will return to 
the up position when the door is closed. 
     
        
        Page 64 of 481
63 Safety and Security
Occupant safety
Panic alarm
Driving safety systems
Anti-theft systems 
     
        
        Page 88 of 481

87 Safety and Security
Panic alarm
Panic alarm
1Â button
Activating
Press and hold button  for at least 
1 second. 
An audible alarm and flashing exterior 
lamps will operate briefly.
Deactivating
Press button  again.
or
Insert the SmartKey or the SmartKey 
with KEYLESS-GO* in starter switch.
or
Press the KEYLESS-GO* start/stop 
button (
page 37).
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 interfer-
ence, and
(2) this device must accept any interference re-
ceived, including interference 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 interference, and
(2) this device must accept any interference re-
ceived, including interference 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 95 of 481
94 Safety and Security
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 (
page 37) on the 
gear selector lever.
Open the driver’s door.Deactivating
With the SmartKey
Insert the SmartKey in the starter 
switch.
With KEYLESS-GO*
Switch on the ignition (page 38).
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 activating 
element (e.g. a door) is immediately 
closed.
iStarting the engine will also deactivate the 
immobilizer.
In case the engine cannot be started (yet the ve-
hicle’s battery is charged), the system is not op-
erational. Contact an authorized Mercedes-Benz 
Center or call 
1-800-FOR-MERCedes (in the USA), or 
1-800-387-0100 (in Canada).