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72 Seats
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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.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.
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73 Seats
Te ch n i c a 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
posi ti on, an d t hen foldin g i t back , t he back rest 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.
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 a n un locked vehi cle. Un supervi sed use of vehicl e
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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74 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Lumbar support (optional)
The thumbwheels are located on the sides of the front
seats.
The seats have an inflatable air cushion built into the
backrest to provide additional lumbar support.
Turn the electronic key in starter switch to position 2.
The inflation pressure of the air cushion can be
continuously varied between position “0” (no pressure)
and position “5” (maximum pressure) by changing the
pressure regulator (1) setting.Multicontour backrest (optional)
The switch clusters are located on the sides of the front
seats.
1Lumbar region
2Center section
3Backrest side cushions
4Massage function (PULSE)
P91.10-2089-26
1
4
1
3
2
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75 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Some models may be equipped with multicontour seats.
These seats have inflatable air cushions built into the
backrests to provide additional lumbar and side support.
Turn the electronic key in starter switch to position 2 to
operate.
We recommend that you make the basic settings in the
following order:
1Lumbar region
Pressj ork to select a lumbar region.
Press and holdæ orç to inflate or deflate the
selected lumbar support.
2Center section
Pressæ orç side of switch and hold; the air
cushion will be inflated or deflated. Release the
switch in the desired position.3Backrest side cushions
The lateral support increases or decreases as you
press the button to the right or left. Adjust the side
cushions to provide good lateral support.
4Massage function(PULSE)
The multicontour backrest is equipped with a
massage function to help prevent fatigue during
longer journeys.
The PULSE function inflates and deflates the air
cushions in the lumbar region rhythmically.
An indicator lamp on the switch lights up when the
PULSE function is switched on. The PULSE function
switches off automatically after approximately
8minutes.
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76 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Seat heater
The seat heaters can be switched on with the electronic
key in starter switch positions 1 or 2.
The buttons are located on each door.
Notes:
When in operation, the seat heater consumes a large
amount of electrical power. It is not advisable to use the
seat heater longer than necessary.The seat heaters may automatically switch off if too
many power consumers are switched on at the same
time or if the battery charge is low. In this case, one or
both indicator lamps will blink.
The seat heaters switch back on again automatically as
soon as sufficient voltage is available.
If the blinking of the indicator lamps is distracting to
you, the seat heaters can be switched off.
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77 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexVehicles without seat ventilation function:
Normal heating mode:
Press button (1).
One indicator lamp in the switch lights up.
The seat heater will be automatically switched off after
approximately 30 minutes.
Rapid heating mode:
Press button (2).
Both indicator lamps in the switch light up.
The system switches over to normal heating mode
automatically after approximately 5 minutes.
Turning off the heater:
Press button (1) or (2) again.
The indicator lamps go out. The seat heater is switched
off.
1
2
P54.25-2131-26
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78 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Vehicles with seat ventilation function:
Rapid heating mode:
Press button (3) once.
Both red indicator lamps above the button light up.
The system switches over to normal heating mode
automatically after approximately 5 minutes.
Normal heating mode:
Press button (3) twice.
One red indicator lamp above the button lights up.
The seat heater will be automatically switched off after
approximately 30 minutes.
Turning off the heater:
Press the button (3) again.
The indicator lamps go out. The seat heater is switched
off.
3
P54.25-2132-26
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79 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Seat ventilation system (optional)
The buttons are located on each door.
Seat ventilation can be activated manually with the
electronic key in starter switch positions 1 or 2, or by
the summer opening function (driver’s seat only), see
page 44.
Notes:
When in operation, the seat ventilation system
consumes a large amount of electrical power. It is not
advisable to use the seat ventilator longer than
necessary.The seat ventilators may automatically switch off if too
many power consumers are switched on at the same
time or if the battery charge is low. In this case, one or
more indicator lamps will blink.
The seat ventilation switch back on again automatically
as soon as sufficient voltage is available.
If the blinking of the indicator lamps is distracting to
you, the seat ventilators can be switched off.
The maximum ventilation level (level 3) is automatically
selected if the driver’s seat ventilation is activated by
the summer opening function, see page 44.
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