Page 41 of 506

39 Getting started
Adjusting
Head restraint height
Press the switch up or down in the di-
rection of arrow5.Head restraint tilt
Manually adjust the angle of the head re-
straint. 
Push or pull on the lower edge of the 
head restraint cushion.
For more information on seats, see the 
“Controls in detail” section (
page 121). 
Steering wheel
iAdjust the head restraint in such a way 
that it is as close to the head as possi-
ble.Warning!
G
For your protection, drive only with properly 
positioned head restraints.
Adjust head restraint so that the center of 
the head restraint supports the back of the 
head at eye level. This will reduce the poten-
tial for injury to the head and neck in the 
event of an accident or similar situation.
Do not drive the vehicle without the seat 
head restraints. Head restraints are intend-
ed to help reduce injuries during an acci-
dent.
iAdjust the head restraint in such a way 
that it is as close to the head as possi-
ble.
Warning!
G
Do not adjust the steering wheel while driv-
ing. Adjusting the steering wheel while driv-
ing could cause the driver to lose control of 
the vehicle.
When leaving the vehicle, always remove the 
SmartKey or the SmartKey with 
KEYLESS-GO* from the starter switch, take 
it with you, and lock your vehicle.
Even with the SmartKey removed from the 
starter switch or the SmartKey with 
KEYLESS-GO* removed from the vehicle, 
the steering wheel adjustment feature can 
be operated when the driver’s door is open. 
Therefore, do not leave children unattended 
in the vehicle, or with access to an unlocked 
vehicle. Unsupervised use of vehicle equip-
ment may cause an accident and / or seri-
ous personal injury. 
     
        
        Page 48 of 506

46 Getting startedDrivingStarting the engine Automatic transmission
Gearshift pattern for automatic 
transmissionPPark position with gear selector lever 
lock
RReverse gear
NNeutral
DDrive position
For more information, see the “Controls in 
detail” section (
page 177). Starting with the SmartKey
For information on turning off the engine 
with the SmartKey, see “Turning off en-
gine” (
page 56).
Gasoline engine:
Make sure the gear selector lever is set 
to P.
Do not depress the accelerator.
Turn the SmartKey in the starter switch 
to position3 and hold until the engine 
starts (
page 34).
Depress the brake pedal.
The selector lever lock is released.
Warning!
G
Inhalation of exhaust gas is hazardous to 
your health. All exhaust gas contains carbon 
monoxide, and inhaling it can cause uncon-
sciousness and lead to death.
Do not run the engine in confined areas 
(such as a garage) which are not properly 
ventilated. If you think that exhaust gas 
fumes are entering the vehicle while driving, 
have the cause determined and corrected 
immediately. If you must drive under these 
conditions, drive only with at least one win-
dow fully open.
iYou can also use the “touch-start” 
function. Turn the SmartKey to 
position3 and release it again immedi-
ately. The engine then starts automati-
cally. 
     
        
        Page 49 of 506

47 Getting started
Driving
Diesel engine:
M a k e  s u r e  t h e  g e a r  s e l e c t o r  l e v e r  i s  s e t  
to P.
Do not depress the accelerator.
Turn the SmartKey in the starter switch 
to position2 (
page 34).
The preglow indicator lampq in the 
instrument cluster comes on.
As soon as the preglow indicator 
lampq goes out, turn the SmartKey 
in the starter switch to position3 
(page 34) and release it.
The engine starts automatically.
Depress the brake pedal.
The selector lever lock is released.Starting with KEYLESS-GO*
You can start your vehicle without the 
SmartKey in the starter switch using the 
KEYLESS-GO start/stop button on the 
gear selector lever.
For information on turning off the engine 
with KEYLESS-GO, see “Turning off with 
KEYLESS-GO*” (
page 57).
The SmartKey with KEYLESS-GO must be 
located in the vehicle.
KEYLESS-GO start/stop button1USA only
2Canada onlyGasoline engine:
Make sure the gear selector lever is set 
toP.
Depress the brake pedal during the 
starting procedure. Do not depress ac-
celerator.
The selector lever lock is released.
Press KEYLESS-GO start/stop 
button1 once.
The engine starts automatically if the 
SmartKey with KEYLESS-GO is in the 
vehicle.
Diesel engine:
Make sure the gear selector lever is set 
toP.
Depress the brake pedal during the 
starting procedure. Do not depress ac-
celerator.
The selector lever lock is released.
Press KEYLESS-GO start/stop 
button1 once.
iIf the engine is at operating tempera-
ture, the preglow indicator lampq 
may not stay on and you can start the 
engine without preglowing.
 
     
        
        Page 50 of 506

48 Getting startedDriving
The engine begins to preglow and will 
start automatically.
If the engine is at operating temperature, 
the preglow indicator lampq may not 
stay on and you can start the engine with-
out preglowing:
Press KEYLESS-GO start/stop 
button1 until the engine is running.Starting difficulties
If the engine does not start as described, 
carry out the following steps:
If you are starting the engine with the 
SmartKey, turn SmartKey in starter 
switch to position0 and repeat starting 
procedure.
If you are starting the engine with 
KEYLESS-GO: Close any doors that 
may be open to allow for better detec-
tion of the SmartKey with 
KEYLESS-GO.
Or:
Start the engine with the SmartKey as 
radio signals from another source may 
be interfering with the SmartKey with 
KEYLESS-GO.
Repeat the starting procedure 
(page 46). Remember that extended 
starting attempts can drain the battery.
Get a jump start (
page 436).If the engine does not start after several 
starting attempts, there could be a mal-
function in the engine electronics or in the 
fuel supply system.
Notify an authorized Mercedes-Benz 
Center.
Parking brake 
1Parking brake pedal
2Parking brake release handle
 
     
        
        Page 51 of 506

49 Getting started
Driving
Release the parking brake by pulling on 
handle2.
The warning lamp ; (USA only) or 
3 (Canada only) in the instrument 
cluster goes out.Driving
Depress the brake pedal.
Move selector lever to positionDorR.
Release the brake pedal.
Carefully depress the accelerator 
pedal.
Once the vehicle is in motion, the automat-
ic central locking system engages and the 
locking knobs drop down.After a cold start, the automatic transmis-
sion engages at a higher revolution. This al-
lows the catalytic converter (gasoline 
engine) or the oxidation catalyst (Diesel 
engine) to reach its operating temperature 
earlier.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or the SmartKey with 
KEYLESS-GO* 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. Children 
could release the parking brake, which 
could result in an accident and/or serious 
injury.
iWait for the gear selection process to 
complete before setting the vehicle in 
motion.iYou can open a locked door from the 
inside. Open door only when conditions 
are safe to do so.
!If you hear a warning signal and a mes-
sage appears in the multifunction dis-
play when driving off, you have 
forgotten to release the parking brake.
Release the parking brake.Warning!
G
On slippery road surfaces, never downshift 
in order to obtain braking action. This could 
result in drive wheel slip and reduced vehi-
cle control. Your vehicle’s ABS will not pre-
vent this type of loss of control. 
     
        
        Page 55 of 506

53 Getting started
Driving
Problems while driving
The engine runs erratically and misfires
An ignition cable may be damaged.
The engine electronics may not be op-
erating properly.
Unburned gasoline may have entered 
the catalytic converter and damaged it 
(Gasoline engine only).
Give very little gas.
Have the problem repaired by an au-
thorized Mercedes-Benz Center as 
soon as possible.
!If anything blocks the windshield wip-
ers (leaves, snow, etc.), switch them off 
immediately.
For safety reasons, 
turn off the engine by turning 
the SmartKey to position0 and 
withdraw SmartKey from starter 
switch
or
turn off the engine by pressing 
the KEYLESS-GO* start/stop 
button and open the driver’s 
door (with the driver’s door 
open, starter switch is in 
position0, same as with 
SmartKey removed from starter 
switch)
before attempting to remove any 
blockage.
Remove blockage.
Turn the windshield wipers on 
again.
If windshield wipers fail to function at 
all in combination switch positionI,
set the combination switch to the 
next highest wiper speed
have the windshield wipers 
checked at the nearest authorized 
Mercedes-Benz Center 
     
        
        Page 57 of 506

55 Getting started
Parking and locking
Parking and locking
You have now completed your first drive. 
You have properly stopped and parked 
your vehicle. End your drive as follows.
Parking brake
1Parking brake
2Release handle
Step firmly on parking brake1.
When the engine is running, the warn-
ing lamp ; (USA only) or 3 
(Canada only) in the instrument cluster 
will be illuminated.
Warning!
G
With the engine not running, there is no 
power assistance for the brake and steering 
systems. In this case, it is important to keep 
in mind that a considerably higher degree of 
effort is necessary to brake and steer the ve-
hicle.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or SmartKey with KEYLESS-GO* 
from the starter switch, take it with you and 
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an 
unlocked vehicle. Children could release the 
parking brake and/or move the gear selec-
tor lever from positionP, either of which 
could result in an accident and/or serious 
injury. 
     
        
        Page 58 of 506

56 Getting startedParking and locking
Switching off headlamps
Turn the exterior lamp switch toM 
(page 50).
For more information, see the “Controls in 
detail” section (
page 133).
Turning off engine 
Place the gear selector lever in 
positionP.Turning off with the SmartKey
Turn the SmartKey in the starter switch 
(page 34) to position0 and remove 
it. 
The immobilizer is activated.
Press the seat belt release button 
(page 44).
Allow the retractor to completely re-
wind the seat belt by guiding the latch 
plate.
Warning!
G
Getting out of your vehicle with the gear se-
lector lever not fully engaged in positionP is 
dangerous. Also, when parked on an incline, 
positionP alone may not prevent your vehi-
cle from moving, possibly hitting people or 
objects.
Always set the parking brake in addition to 
shifting to positionP. 
When parked on an incline, turn front wheels 
towards the road curb.
iAlways set the parking brake in addi-
tion to shifting to positionP.
On slopes, turn the front wheels to-
wards the road curb.
iThe SmartKey can only be removed 
from the starter switch with the gear 
selector lever in positionP.iWith the SmartKey removed and the 
driver’s door open, a warning sounds 
and the message 
Switch off lights 
appears in the multifunction display if 
the vehicle’s exterior lamps are not 
switched off.