Page 66 of 424
63 Antitheft alarm system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Notes:
We recommend that you carry the electronic reserve
key plus mechanical key with you and keep it in a safe
place (e.g. your wallet) so that it is always handy. Never
leave the electronic reserve key in the vehicle.
When you unlock the driver’s door with the mechanical
key, the exterior lamps will flash and the alarm will
sound. To cancel the alarm, insert the electronic key in the
starter switch or press buttonŒ or‹ on the
electronic main key; or (vehicles with KEYLESS-GO)
when carrying the KEYLESS-GO-card, grasp the door
handle or press the start-/stop button on the gear
selector lever.
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65 Tow-away alarm
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index To prevent triggering the tow-away alarm feature, switch
off the tow-away alarm before towing the vehicle, or
when parking on a surface subject to movement, such
as a ferry or auto train.
To do so, turn electronic key in starter switch to
position 1 or 0, or remove electronic key from starter
switch. Press tow-away alarm switch (1). The indicator
lamp (2) illuminates briefly.Exit vehicle, and lock vehicle with the electronic main
key or (vehicles with KEYLESS-GO) the lock button at
each door handle.
The tow-away alarm remains switched off until the
vehicle is locked again with the electronic main key or
the lock button at each door handle (vehicles with
KEYLESS-GO) at which time it is automatically
reactivated.
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66 Easy-entry/exit feature
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Easy-entry/exit feature
The switch is located on the steering column adjustment
lever.
Turn the switch in direction:
1to switch on
2to switch offWith the easy-entry/exit feature activated, the steering
wheel tilts upwards to allow easier entry into and exit
from the vehicle when the driver’s door is opened.
However, the engine must be turned off.
When the electronic key is inserted in the starter switch
or, with a valid KEYLESS-GO-card, when pressing the
start-/stop button on the gear selector lever, and if the
driver’s door is closed, the steering wheel returns to the
last position set for it.
Wa r n i n g !
You must ensure that no one can become trapped
or injured by the moving steering wheel with the
easy-entry/exit feature activated and you open the
driver’s door or remove the electronic key from the
starter switch. Do not leave children unattended in
the vehicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may cause
serious personal injury.
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Page 70 of 424

67 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Front seat adjustment
To operate the front power seat adjustment switches,
turn the electronic key in starter switch to position 1
or 2 (with a front door open, the power seats can also be
operated with the electronic key removed or in starter
switch position 0).
Wa r n i n g !
Do not adjust the driver’s seat while driving.
Adjusting the seat while driving could cause the
driver to lose control of the vehicle.Never ride in a moving vehicle with the seat back
reclined. Sitting in an excessively reclined position
can be dangerous. You could slide under the seat
belt in a collision. If you slide under it, the belt
would apply force at the abdomen or neck. That
could cause serious or fatal injuries. The seat back
and seat belts provide the best restraint when the
wearer is in an upright position and belts are
properly positioned on the body.Never place hands under seat or near any moving
parts while a seat is being adjusted.
When leaving the vehicle always remove the
electronic key from the starter switch, take the
KEYLESS-GO-card (if so equipped) with you, and
lock your vehicle. The power seats can also be operated with the
driver’s or front passenger door open. Do not leave
children unattended in the vehicle, or with access
to an unlocked vehicle. Unsupervised use of vehicle
equipment may cause serious personal injury.
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Page 75 of 424

72 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Backrest
Folding forward:
Lift release lever and fold backrest forward. The seat
will automatically slide forward and the head restraint
will move down.
Folding back:
Lift release lever and fold backrest back. The seat and
head restraint return to their previous positions.
To interrupt the procedure, activate the power seat
switch located in the front door.
Wa r n i n g !
The seat belts provide protection only with the
backrest locked in place and, therefore, must be
locked in place with the vehicle in motion. Do not
drive the vehicle when the backrest is not locked in
place. If the warning message “SEAT BACKREST
LEFT – LOCK!” or “SEAT BACKREST RIGHT –
LOCK!” is displayed in the multifunction display,
then the respective backrest is not engaged in its
lock. Carefully slow down, and drive with caution
to an area which is in a safe distance from the
roadway. Always provide sufficient room behind
the backrest and fold the backrest all the way back
until it locks in place.The warning message is no longer displayed as
soon as the backrest is locked in place. If both
backrests are locked in place and the warning
message is still displayed, have the system checked
at your authorized Mercedes-Benz Center
immediately.
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Page 76 of 424

73 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexNotes:
The automatic seat slide is provided with a safety
feature.
The automatic process is interrupted, if the backrest of
the sliding seat is pushed against an occupant or object.
The seat will slide forward and stop.
Investigate and correct the cause of interruption.
Now use memory button (page 112) or power seat switch
(page 68) to bring seat into desired position.
When folding the backrest forward from a reclined
position, and then folding it back, the backrest stops in a
more upright position for the safety of any rear-seat
passenger. Adjust the backrest until your arms are
slightly angled when holding the steering wheel, see
page 68.
When leaving the vehicle always remove the
electronic key from the starter switch, take the
KEYLESS-GO-card (if so equipped) with you, and
lock your vehicle.The power seats can also be operated with the
driver’s or passenger door open. Do not leave
children unattended in the vehicle or with access
to an unlocked vehicle. Unsupervised use of vehicle
equipment may cause serious personal injury.Never place hands under seat or near any moving
parts during a seat adjustment procedure.
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Page 86 of 424

83 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexSeat belt nonusage warning system
With the electronic key in starter switch position 2, a
warning sounds for a short time if the driver’s seat belt
is not fastened.
Automatic comfort-fit seat belt:
An automatic comfort-fit feature for driver and front
passenger seat belt is activated when the electronic key
in the starter switch is turned to position 1 or 2.
The retraction force of the inertia reel is reduced,
increasing the level of seat belt comfort.
Note:
For cleaning and care of the seat belts see page 382.
Wa r n i n g !
The seat belts provide protection only with the
backrest locked in place. Do not drive the vehicle
when the backrest is not locked in place. If the
warning message “SEAT BACKREST LEFT – LOCK!”
or “SEAT BACKREST RIGHT – LOCK!” is displayed
in the multifunction display, then the respective
backrest is not engaged in its lock. For backrest see
page 72.Never ride in a moving vehicle with the backrest
reclined. Sitting in an excessively reclined position
can be dangerous. You could slide under the seat
belt in a collision. If you slide under it, the belt
would apply force at the abdomen or neck. That
could cause serious or even fatal injuries. The
backrest and seat belt provide the best restraint
when the wearer is in an upright position and the
belt is properly positioned on the body.
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Page 89 of 424

86 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Operation of seat belts
The inertia reel stops the belt from unwinding during
sudden stops or when quickly pulling on the belt.
The locking function of the reel may be checked by
quickly pulling out the belt.
Caution!
For safety reasons, avoid adjusting the seat or seat back
into positions which could affect the correct seat belt
positioning.
Unfastening of seat belts
Press release button (3) in the belt buckle (2).
Allow the retractor to completely rewind the seat belt by
guiding the latch plate (1).
Wa r n i n g !
USE SEAT BELTS PROPERLY.• Seat belts can only work when used properly.
Never wear seat belts in any other way than as
described in this section, as that could result
in serious injuries in case of an accident.• Each occupant should wear their seat belt at all
times, because seat belts help reduce the
likelihood of and potential severity of injuries
in accidents, including rollovers. The
integrated restraint system includes “SRS”
(driver airbag, front passenger airbag, side
impact airbags, head protection window
curtain airbags for side windows), “ETR” (seat
belt emergency tensioning retractors), and
front seat knee bolsters. The system is
designed to enhance the protection offered to
properly belted occupants in certain frontal
(front airbags) and side (side impact and
window curtain airbags) impacts which exceed
preset deployment thresholds.
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