Page 76 of 421
73 Seats
Te ch n ica 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 and rear seats.
The seats have an inf latable 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)
Front seats:
The switch clusters are located on the side and near the
front of the front seats.
1Lumbar region
2Center section
3Backrest side cushions
4Massage function (PULSE)
P91.25-0335-26
1
P91.25-0336-26
3
3
4
1
3
2
Page 77 of 421

74 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Rear seats:
The switch clusters are located on the sides of the seat.
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
follow ing orde r:
1Lu mb a r region
2Center section
(front seats only)
Switches 1 and 2:
Press top of switch and hold; the individual air
cushions will be inflated one after the other. Release
the switch in the desired position.
Press bottom of switch and hold; the individual air
cushions will be deflated one after the other.
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.
P91.25-2009-26
31
4
3
Page 78 of 421

75 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 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 backrest rhythmically.
An indicator lamp on the switch lights up when the
PULSE function is switched on. The PULSE function
switches off automatically after approximately
5minutes.
Note:
If the top cushion is inflated, only the middle air
cushion is inflated and deflated.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.
Note:
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.
Page 83 of 421
80 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Rear seat head restraints
The switch is located on the center console.
Turn the electronic key in starter switch to position 1
or 2.
Folding head restraints back:
Press the symbol-side on the rocker switch to release
the head restraints. The head restraints will fold
backward for increased visibility.Placing head restraints upright:
Pull the head restraint forward until it locks into
position.
Angle of head restraints:
The head restraint angle can be adjusted manually.
Important!
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.
Page 84 of 421

81 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Power head restraints, rear
The switch is located on the center console.
Turn electronic key in starter switch to position 1 or 2.
Activate switch:
1Fold head restraint backwards.
2Place head restraint upright.Important!
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.
Notes:
The two outer head restraints fold up or back together.
The center head restraint also folds back if there are
three head restraints in the rear.
The center head restraint in vehicles with three rear
seat positions does not position itself automatically. It
must be pulled up by hand until it locks into place.
The head restraints on the two outer seats will position
themselves automatically when the seats are occupied
(seat belt buckled).
Page 85 of 421
82 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Power seats, rear
The switches are located on each rear door.
Activate switch:
1Place head restraint upright
2Fold head restraint backwardsThe appropriate outer head restraint can be folded up or
back.
The head restraint angle can be adjusted manually.
The seats can be adjusted using the slide switches
located in either of the rear doors.
Turn the electronic key in starter switch to position 1
or 2 (with respective door open, that power seat can also
be operated with the electronic key removed or in
starter switch position 0).
21
P54.00-2003-26
Page 86 of 421
83 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Seat bench
1Fore and aft adjustment
The seat cushion moves fore / aft, together with the
inclination of the backrest.
2Head restraint
Press the switch up or down.
The head restraints can be placed individually in
either upright or fold-down positions. Individual seats
1Fore and aft adjustment
The seat cushion moves fore / aft together with the
inclination of the backrest.
2Cushion tilt
Press the switch up or down.
3Head restraint
Press the switch up or down.
2
1
1
P54.00-2005-26
3
22
1
1
P54.00-2006-26
Page 87 of 421

84 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Seat belts and integrated restraint system
Your vehicle is equipped with seat belts for all seats,
emergency tensioning retractors for all outboard seat
belts, dual front airbags, side impact airbags for driver,
front and outer rear passengers, and head protective
window curtain airbags. Their protective functions are
designed to complement one another.
Seat belts
Important!
Laws in most states and all Canadian provinces require
seat belt use.
All states and provinces require use of child restraints
that comply with U.S. Federal Motor Vehicle Safety
Standard 213 and Canadian Motor Vehicle Safety
Standard 213.
All child restraints systems are designed to be secured
in vehicle seats by lap belts or the lap belt portion of a
lap-shoulder belt.
For your safety and that of your passengers we strongly
recommend their use.
Wa r n i n g !
Children 12 years old and under must never ride in
the front seat, except in a Mercedes-Benz
authorized BabySmart
TM compatible child seat,
which operates with the BabySmart
TM system
installed in the vehicle to deactivate the passenger-
side front airbag when it is properly installed.
Otherwise they will be struck by the airbag when it
inflates in a crash. If this happens, serious or fatal
injury will result.
According to accident statistics, children are safer
when properly restrained in the rear seating
positions than in the front seating positions.
Infants and small children must ride in back seats
and be seated in an appropriate infant or child
restraint system, which is properly secured with
the vehicle’s seat belt, fully in accordance with the
child seat manufacturer’s instructions.A child’s risk of serious or fatal injuries is
significantly increased if the child restraints are
not properly secured in the vehicle and the child is
not properly secured in the child restraint.