Page 37 of 399

37 Getting started
Adjusting
Folding rear head restraints back with
switch in the center console
1Head restraint release switch
Turn the electric key in starter switch
to position1 or 2.
Press the symbol-side on rocker
switch1 to release the head restraints.
The head restraints will fold backward.Placing rear head restraints upright
Pull the head restraint forward until it
locks into position.
Steering wheelWarning!
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
key from the starter switch, take the Smart-
Key with KEYLESS-GO* (if so equipped) with
you and lock your vehicle.
The electrical steering wheel adjustment
feature can also be operated with the driv-
er’s door open. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause serious personal
injury.
Page 86 of 399

86 Controls in detailLocking and unlockingIn the "Controls in detail" section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. If you are already familiar with the
basic functions of your vehicle, this section
will be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
"Getting started" section of this manual.
The corresponding page numbers are giv-
en at the beginning of each segment.
Locking and unlockingKeys
Your vehicle comes supplied with two
SmartKeys with remote controls and a re-
movable mechanical key. The locking tabs
for the mechanical key portion of the two
keys are a different color to help distin-
guish each key unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The Smartkey centrally locks and unlocks
the doors
the trunk
the fuel filler flap
SmartKey with remote controls1‹ Lock button
2Š Unlock button for the trunk lid
3Mechanical key locking tab
4Œ Unlock button
5Battery check lamp
6Â Panic button (
page 72).
iYou can also open and close the power
windows (
page 184) and slid-
ing/pop-up roof* (
page 187) or pan-
orama sliding/pop-up roof*
(
page 192) using the SmartKey.
!To prevent possible malfunction, avoid
exposing the key to high levels of elec-
tromagnetic radiation.
Page 87 of 399

87 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps blink once. The
locking knobs in the doors move up.
The vehicle will lock again automatically
within approximately 40 seconds of un-
locking if neither door nor trunk is opened,
the SmartKey is not inserted in the starter
switch, or the central locking switch is not
activated.
Global locking
Press button‹.
All turn signal lamps blink three times.
The locking knobs in the doors move
down.Selective setting
If you frequently travel alone, you may wish
to reprogram the key so that
pressingŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp5 blinks twice.
The key will then function as follows:
Unlocking driver’s door and fuel filler
flap
Press buttonŒ once.
Global unlocking
Press buttonŒ twice.
Global locking
Press button‹.Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 blinks twice.Warning!
G
When leaving the vehicle always remove the
key from the starter switch, take the Smart-
Key with KEYLESS-GO (if so equipped) with
you and lock the vehicle. Do not leave chil-
dren unattended in the vehicle, or with ac-
cess to an unlocked vehicle. It is possible for
children to open a looked door from the in-
side, which could result in an accident or se-
rious injury.
Page 89 of 399

89 Controls in detail
Locking and unlocking
Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you grasp a door
handle.
If the SmartKey with KEYLESS-GO* is valid,
your vehicle unlocks
the doors
the trunk lid
the fuel filler flap
iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 96). The
turn signals will flash three times to
confirm locking.
If the vehicle was previously separately
locked (
page 98), the trunk lid will re-
main locked.
Page 92 of 399

92 Controls in detailLocking and unlockingUnlocking the trunk lid
The handle is located in the rear license
plate recess.
Pull on the handle and lift up the trunk
lid.
The vehicle unlocks the trunk lid only.
If the vehicle was previously separately
locked or locked with the SmartKey, the
trunk lid will remain locked.The trunk can also be opened from the in-
side in an emergency, see "Trunk lid emer-
gency release" (
page 97).Locking the vehicle
1Lock button at trunk
Press the lock button at door
(page 53) or trunk.
Closing the side windows and slid-
ing/pop-up roof*
Press and hold lock button at door
(page 53) or trunk until the side win-
dows and the sliding/pop-up roof are
closed.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
iIf the vehicle was previously centrally
locked with the SmartKey, the trunk lid
will lock automatically after closing it.
The turn signals will flash three times to
confirm locking.
If you have left the SmartKey with KEY-
LESS-GO in the trunk, the trunk lid will
not close.
Page 97 of 399

97 Controls in detail
Locking and unlocking
Closing from outside
1Trunk closing switch
Press the closing switch briefly.
The trunk lid closes automatically.
When closing, if the trunk lid comes into
contact with an object (e.g. luggage that
has been piled too high) in the upper mo-
tion sequence, the closing procedure is
stopped and the trunk re-opens slightly.
Trunk lid emergency release
The emergency release button is located
on the inside of the trunk lid.
1Emergency release button
Briefly press the emergency release
button.
The trunk unlocks and the trunk lid
opens.
Warning!
G
Monitor the closing procedure carefully to
ensure that no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
press the remote control switch for the
trunk lid or the
Š
key on the remote con-
trol.
!Do not place the key in the open trunk.
You may lock yourself out.
Vehicles with KEYLESS-GO*:
To prevent a possible inadvertent lock-
out, the trunk lid will open automatical-
ly if a SmartKey with KEYLESS-GO is
recognized in the area of the rear shelf
or inside the trunk.
!The emergency release button unlocks
and opens the trunk while the vehicle is
standing or driving.
Page 99 of 399

99 Controls in detail
Locking and unlocking
Separately unlocking the trunk
Pull the mechanical key out of the
SmartKey (
page 329).
Insert the mechanical key in the trunk
lid lock.
Turn the key completely to the left to
position1, see above.
You can now open the trunk (
page 96).
Automatic central locking
The doors and the trunk automatically lock
when the ignition is switched on and the
wheels are turning at vehicle speeds of ap-
proximately 9 mph (15 km/h) or more.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
You can deactivate the automatic locking
mode over the control system
(
page 142).
iUnlocking the trunk with the mechani-
cal key will trigger the anti-theft alarm
system. To cancel the alarm, do one of
the following:
Press button Œor ‹on the
SmartKey.
Insert the SmartKey in the starter
switch.
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle automatically locks when
the ignition is switched on and the
wheels are turning at vehicle speeds of
approximately 9 mph (15 km/h) or
more. You could therefore lock yourself
out when the vehicle
is pushed
is on a test stand
Page 100 of 399
100 Controls in detailLocking and unlockingLocking and unlocking from the inside
You can lock or unlock the doors and the
trunk from inside using the central locking
switch. This can be useful, for example, if
you want to lock the vehicle before starting
to drive.
The fuel filler flap cannot be locked or un-
locked with the central locking switch.The switch is located in the center console.
Central locking switch1Locking
2Indicator lamp
3UnlockingLocking
Press upper half1 of the central lock-
ing switch.
If both front doors are closed, the vehi-
cle locks.
Unlocking
Press lower half2 of the central lock-
ing switch.
The vehicle unlocks.
Warning!
G
When leaving the vehicle, always remove the
key 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. Unsupervised use of
vehicle equipment may cause serious per-
sonal injury.