Page 129 of 522
128 Controls in detailLocking and unlockingCentral locking switch1Unlocking
2LockingLocking
Press lower half 2 of the central lock-
ing switch.
If all doors are closed, the vehicle
locks.
Unlocking
Press upper half1 of the central lock-
ing switch.
The vehicle unlocks.
i
You can open a locked door from inside at
any time. Open door only when conditions are
safe to do so.
If the vehicle was previously centrally locked
with the SmartKey or with KEYLESS-GO*, it will
not unlock using the central locking switch.
If the vehicle was previously locked with the cen-
tral locking switch:
and the SmartKey or SmartKey with
KEYLESS-GO* is set to factory settings, the
complete vehicle is unlocked when a door is
opened from the inside
and the SmartKey or SmartKey with
KEYLESS-GO* is set to selective settings,
only the door opened from the inside is un-
locked
Page 130 of 522

129 Controls in detailSeats
Seats
For more information on seat adjustment,
see “Adjusting” (
page 41).
For more information on folding the seats,
see “Loading” (
page 273).
Front seat active head restraints
You cannot remove the active head re-
straint on the driver’s and front passen-
ger’s seats.For removal of the active head restraints
we recommend that you contact an autho-
rized Mercedes-Benz Center.
For information on head restraint adjust-
ment, see “Seat adjustment” (
page 43).
For information on active head restraints,
see “Active head restraints” (
page 87).
Rear seat head restraints
Warning!
G
For your protection, drive only with properly
positioned head restraints.
Adjust the head restraint so that the center
of the head restraint supports the back of
the head at eye level. This will reduce the po-
tential 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.
i
Adjust the head restraint in such a way that
it is as close to the head as possible.Warning!
G
For safety reasons, always drive with the
rear head restraints in the upright position
when the rear seats are occupied.
Keep the area around head restraints clear
of articles (e.g. clothing) to not obstruct the
folding operation of the head restraints.
Warning!
G
For your protection, drive only with properly
positioned head restraints.
Adjust head restraint so that the head re-
straint supports the back of the head at eye
level. This will reduce the potential for injury
to the head and neck in the event of an ac-
cident 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.
Do not interchange head restraints from
front and rear seat.i
The rear seat head restraints cannot be ad-
justed.
Page 131 of 522
130 Controls in detailSeatsFolding head restraints back with
switch in the center console
The rear seat head restraints can be folded
backward for increased visibility.
1Head restraint release switch
Switch on the ignition (
page 37).
Press the symbol-side on switch1to
release the head restraints.
The head restraints will fold backward.Placing head restraints upright
Pull the head restraint forward until it
locks into position.Removing and installing rear seat head
restraints* (vehicles with split rear
bench seat* only)
1Release catch
Removing rear seat head restraints
Fold the backrest forward
(page 277).
Fold back head restraint (
page 130).
Press head restraint release catch1
and pull the head restraints out of the
guides.
Fold the backrest back to its original
position.
!
Make sure the head restraints engage when
placing them upright. Otherwise their protective
function cannot be assured.
Page 132 of 522

131 Controls in detailSeats
Installing rear seat head restraintsLumbar support
The curvature of the front seats can be ad-
justed to help enhance lower back support
and seating comfort.
1Adjustment lever
Move adjustment lever1 in direction
of the arrows until you have reached a
comfortable seating position.
Multicontour seat*
The multicontour seat has a movable seat
cushion and inflatable air cushions built
into the backrest to provide additional lum-
bar and side support.
The seat cushion movement, backrest
cushion height and curvature can be con-
tinuously varied with switches on the right
side of the seat on the driver side, or the
left side of the seat on the passenger side.1Backrest side bolster
2Backrest center
3Backrest bottom
4Seat cushion depth
Switch on the ignition (
page 37).
Seat cushion depth
Adjust the seat cushion depth to the
length of your upper leg using
switch4.
Backrest contour
Adjust the contour of the backrest to
the desired position using æ or
ç.
i
When installing the head restraints, make
sure that:
you place the correct head restraint on the
middle seat. It is marked with the letter “M”
on the outside of the metal bars.
the head restraints engage fully.
Page 133 of 522
132 Controls in detailSeats
Move the backrest support cushion to
the bottom by using button3 or to the
center by using button2.
Backrest side bolsters
Adjust the side bolsters so that they
provide good lateral support using
switch1.
Seat heating*
The red indicator lamps on the switch
show the heating level selected.
1Front seat heating switch
1Rear seat heating switch (Canada only)
Depending on production date, your
vehicle may not be equipped with the rear
seat heating.
i
If, after a period of time, the seat no longer
provides the desired contour, then repeat the ad-
justment procedure.
Level3
Three indicator lamps on
(highest level).
The seat heating automatically
switches to level2 after approxi-
mately 5 minutes.
2
Two indicator lamps on.
The seat heating automatically
switches to level1 after approxi-
mately 10 minutes.
1
One indicator lamp on
(lowest level).
The seat heating automatically
switches off after approximately
20 minutes.
off
No indicator lamp on.
Page 134 of 522

133 Controls in detailSeats
Switching seat heating on
Switch on the ignition (
page 37).
Press switch1.
Three red indicator lamps on the switch
come on.
Continue pressing switch1 until de-
sired seat heating level is reached.
Switching seat heating off
Press switch1 repeatedly until all in-
dicator lamps go out.
Seat ventilation*
The blue indicator lamps on the switch
show the ventilation level selected.1Seat ventilation switch
Switch on the ignition (
page 37).Switching seat ventilation on
Press button1 repeatedly until the
desired ventilation level is set.
One or more blue indicator lamps on
the switch show the selected ventila-
tion level.
Switching seat ventilation off
Press button1 repeatedly until all in-
dicator lamps go out.
i
If one or more of the lamps on the seat heat-
ing switch are flashing, there is insufficient volt-
age available since too many electrical
consumers are turned on. The seat heating
switches off automatically.
The seat heating will switch back on again auto-
matically as soon as sufficient voltage is avail-
able.
Level3
Three indicator lamps on
(highest level).
2
Two indicator lamps on.
1
One indicator lamp on
(lowest level).
off
No indicator lamp on.
i
The seat ventilation for the driver’s seat can
be activated using summer opening feature
(
page 239).
i
If one or more of the lamps on the seat ven-
tilation switch are flashing, there is insufficient
voltage available since too many electrical con-
sumers are turned on. The seat ventilation
switches off automatically.
The seat ventilation will switch back on again au-
tomatically as soon as sufficient voltage is avail-
able.
Page 135 of 522

134 Controls in detailMemory functionPrior to operating the vehicle, the driver
should check and adjust the seat height,
seat position fore and aft, and seat back-
rest angle if necessary, to ensure adequate
control, reach and comfort. The head re-
straint should also be adjusted for proper
height. See also the section on air bags
(page 70) for more information on prop-
er seat positioning.
In addition, adjust the steering wheel to
ensure adequate control, reach, operation
and comfort. Both the interior and exterior
rear view mirrors should be adjusted for
adequate rear vision.
Fasten seat belts. Infants and small chil-
dren should be seated in a properly se-
cured restraint system that complies with
U.S. Federal Motor Vehicle Safety Stan-
dards 213 and 225 and Canadian Motor
Vehicle Safety Standards 213 and 210.2.With the memory function you can store up
to three different settings.
Each stored position on the driver’s side
includes the following settings:
Driver’s seat, backrest, head restraint
position
Multicontour seat*: previously saved
setting
Steering wheel position
Exterior rear view mirrors’ positionEach stored position on the front
passenger side includes the following
settings:
Front passenger seat, backrest, head
restraint position
Multicontour seat*: previously saved
setting
Warning!
G
Do not activate the memory function while
driving. Activating the memory function
while driving could cause the driver to lose
control of the vehicle.
Page 136 of 522

135 Controls in detail
Memory function
MMemory button
1, 2, 3Memory position button
Switch on the ignition (
page 37).
or
Open the respective door.
Storing positions into memory
Adjust the seats, steering wheel and
exterior rear view mirrors to the de-
sired position (
page 41).
Press memory buttonM.
Release memory buttonM and press
memory position button 1, 2 or 3 with-
in 3 seconds.
All the settings are stored to the select-
ed position.
Recalling positions from memory
Press and hold memory position
button1, 2 or3 until the seat, steering
wheel and exterior rear view mirrors
have completely moved to the stored
positions.
!
Do not operate the power seats using the
memory button if the seat backrest is in an ex-
cessively reclined position. Doing so could cause
damage to front or rear seats.
First move seat backrest to an upright position.
i
Releasing the memory position button stops
movement to the stored positions immediately.
The multicontour seat* will continue to be ad-
justed.