Page 97 of 384

97 Controls in detail
Seats
Head restraints
Information on head restraint adjustment
can be found in the “Getting started” sec-
tion (
page 36).Front seat head restraints
Removing front head restraints
Press switch1 upwards and hold until
the head restraint is fully extended.
Pull out head restraint.
Installing front head restraints:
Press switch1 upwards and hold for
about five seconds.
Push the head restraint down until it
engages.
Adjust head restraint to desired posi-
tion (
page 35).Rear seat head restraints
Folding rear head restraints back
Make sure the ignition is switched on.
All the lamps in the instrument cluster
should light up.
Warning!
G
For your protection, drive only with properly
positioned head restraints.
Adjust head restraint to support the back of
the head approximately at ear level.
Do not drive the vehicle without the seat
head restraints. Head restraints are intend-
ed to help reduce injuries during an acci-
dent.iTilt the seat backrest to the rear for
easier removal and installation of the
head restraints.
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.iYou can adjust the angle manually by
pulling or pushing the head restraints
by hand.
Page 98 of 384

98 Controls in detailSeats
Press switch1.
The rear head restraints will fold back-
ward.
Placing rear head restraints upright
Pull the rear head restraint upright until
it locks into position.Head restraint tilt
The rear head restraint angle can be ad-
justed manually.
Power head restraints, rear*
You can fold the rear head restraints back-
ward or upright using the head restraint
folding switch. The switch is located:
on the front center console:
Make sure the ignition is switched
on.
All the lamps in the instrument clus-
ter should light up
Press switch1 briefly.
The rear head restraints will fold
backward.
Press switch1 and hold.
The rear head restraints will fold up-
right.
on the rear center console:
Make sure the ignition is switched
on.
All the lamps in the instrument clus-
ter should light up
Push upper half1 of switch.
The rear head restraints will fold up-
right.
Push lower half2 of switch.
The rear head restraints will fold
down.
!Make sure that the head restraints en-
gage when adjusting them manually.
Otherwise, their protective function
cannot be assured.
Page 99 of 384

99 Controls in detail
Seats
Multicontour seat*
The multicontour seat has a movable seat
cushion and inflatable air cushions built
into the seat backrest to provide additional
lumbar and side support.
The seat cushion movement, seat backrest
cushion height and curvature can be con-
tinuously varied with regulators on the
right side of the seat after turning the
SmartKey in the starter switch to
position2 or pressing the KEYLESS-GO*
start / stop button twice.1Shoulder region support
2Side bolster adjustment
3Massage function (PULSE)
4Lumbar region support
Adjusting the multicontour seat in the or-
der listed above is recommended.
Make sure the ignition is switched on.
All lamps in the instrument cluster light
up.
Shoulder region support
Press
æ
or
ç
on switch1.
The air cushion inflates or deflates.Lumbar region support
Press
k
or
j
on rocker
switch4.
This selects the air cushion you wish to
adjust.
Press
æ
or
ç
on rocker
switch4.
The air cushion inflates or deflates.
Side bolsters adjustment
Adjust the side bolsters so that they
provide good lateral support using
switch 2.iWhen the engine is turned off, the last
cushion setting is retained in memory,
and the cushion is automatically ad-
justed to this setting when the engine
is restarted.
Page 100 of 384

100 Controls in detailSeatsMassage function (PULSE)
You can reduce muscle tension during long
trips by periodically using the massage
function.
Press button3.
The indicator lamp on button3 lights
up. The air cushions in the lumbar re-
gion inflate and deflate rhythmically.
Folding forward front seat backrests
Folding seat backrests forward
Lift release lever and fold backrest for-
ward.
The seat will automatically slide for-
ward and the head restraint will move
down.Folding seat backrests to the rear
Lift release lever and fold backrest
back.
The seat and head restraint return to
their previous positions.
To interrupt the procedure, activate the
seat adjustment switch (
page 35).
iThe massage function switches off au-
tomatically after approximately eight
minutes. The indicator lamp goes out.
iThe head restraint is automatically low-
ered.
iWhen moving the seat, be sure that
there are no items in the footwell or be-
hind the seats. Otherwise you could
damage the seats.Warning!
G
Always ensure that no one can become
trapped or injured when the seat is moving.
In case potential danger exists, the proce-
dure can be interrupted by moving the seat
adjustment switch (
page 35) in the door
control panel.
Page 101 of 384

101 Controls in detailSeats
Warning!
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 warn-
ing message
SEAT BACKREST, RIGHT -
LOCK
or
SEAT BACKREST, LEFT - 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 back-
rest all the way back until it locks in place.
Keep the area around head restraints clear
of articles (e.g. clothing) to not obstruct the
folding operation of the head restraints.
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 Mer-
cedes-Benz Center immediately.
When leaving the vehicle, always remove the
electronic key from the starter switch, take
the KEYLESS-GO* card 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. Unsu-
pervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Never place hands under seat or near any
moving parts during a seat adjustment pro-
cedure.
!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 in-
terruption.
Now use memory button (
page 105)
or seat adjustment switch (page 35)
to bring seat into desired position.
When folding the backrest forward
from a reclined position, and then fold-
ing 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 an-
gled when holding the steering
wheel (
page 35).
Page 102 of 384

102 Controls in detailSeatsSeat ventilation*
The switch is located on the door. Seat
ventilation can be activated manually with
the electronic key in starter switch posi-
tion 1 or 2, or by the summer opening fea-
ture (
page 171). The blue indicator
lamps on the switch show the ventilation
level selected:
1Seat ventilation switch
Make sure the ignition is switched on.
All lamps in the instrument cluster light
up.
Switching on seat ventilation
Press switch1.
Three blue indicator lamps above the
switch light up.
Continue pressing switch1 until the
desired seat ventilation level is
reached.Switching off seat ventilation
Press switch1 repeatedly until all indi-
cator lamps go out.
Level3
Three indicator lamps on
2
Two indicator lamps on
1
One indicator lamp on
off
No indicator lamp on
iThe seat ventilation is automatically set
to the highest level if activated via sum-
mer opening feature (
page 171).
!If one or all of the lamps blink on the
seat ventilation switch, there is insuffi-
cient voltage due to too many electrical
consumers being switched on. The seat
ventilation switches off automatically.
The seat ventilation will switch back on
again automatically as soon as suffi-
cient voltage is available.
Page 103 of 384

103 Controls in detailSeats
Seat heating
Vehicles without seat ventilation*
The switch is located on the door.
1Normal heating
2Rapid heating
Make sure the ignition is switched on.
All the lamps in the instrument cluster
light up.Switching on seat heating
Press switch1.
A red indicator lamp above the switch
lights up.
Switching off seat heating
Press switch1 again.
Rapid seat heating mode
Press switch2.
Both red indicator lamps above the
switch light up. Switching off rapid seat heating mode
Press switch2 again.
iThe seat heating will be automatically
switched off after approximately
30 minutes. iThe system switches over to normal
heating mode after approximately five
minutes. Only the right-hand indicator
lamp remains lit.
!If one or both of the lamps on the seat
heating switch are blinking, there is in-
sufficient voltage due to too many elec-
trical consumers being turned on. The
seat heating switches off automatical-
ly.
The seat heating will switch back on
again automatically as soon as suffi-
cient voltage is available.
Page 104 of 384

104 Controls in detailSeatsVehicles with seat ventilation*
The switch is located on the door. The red
indicator lamps on the switch show the
heating level selected:
1Seat heating switch
Make sure the ignition is switched on.
All the lamps in the instrument cluster
light up.Switching on seat heating
Press switch1 twice.
A red indicator lamp above the switch
lights up.
Switching off seat heating
Press switch1 again.
Rapid seat heating
Press switch1 once.
Both indicator lamps above the switch
light up. Switching off rapid seat heating mode
Press switch position1 twice.
Level2
Two indicator lamps on
1
One indicator lamp on
off
No indicator lamp on
iThe seat heating will be automatically
switched off after approximately
30 minutes. iThe system switches over to normal
heating mode after approximately five
minutes. Only the right-hand indicator
lamp remains lit.
!If one or both of the lamps on the seat
heating switch are blinking, there is in-
sufficient voltage due to too many elec-
trical consumers are turned on. The
seat heating switches off automatical-
ly.
The seat heating will switch back on
again automatically as soon as suffi-
cient voltage is available.