
3 ContentsCoat hooks ...................................... 192
Cup holder ...................................... 193
Ashtrays .......................................... 196
Lighter ............................................. 198
Parcel net in trunk ........................ 199
Cargo tie-down hooks ....................200
Parcel net in front
passenger footwell ....................200
Telephone, general ........................ 201
Garage door opener .......................202
Infrared reflecting windshield ....206
DrivingControl and operation of radio
transmitters ...............................208
The first 1 000 miles
(1 500 km) .................................209
Maintenance ...................................209
Tele Aid ........................................... 210
Catalytic converter ........................220
Emission control ............................221
Starter switch .................................222
Starter switch – KEYLESS-GO ......224Starting and turning off
the engine .................................. 227
Automatic transmission ............... 229
Parking brake ................................ 238
Driving instructions ...................... 239
Drive sensibly – save fuel ........ 239
Drinking and driving ................ 239
Pedals .......................................... 240
Power assistance ........................ 240
Brakes .......................................... 240
Driving off ................................... 241
Parking ........................................ 242
Tires ............................................. 243
Snow chains ............................... 245
Winter driving instructions ..... 246
Deep water .................................. 248
Passenger compartment ........... 248
Traveling abroad ........................ 249
Cruise control ................................ 250
Distronic (DTR) .............................. 253
Brake assist system
(BAS) .......................................... 268
Antilock brake system
(ABS) .......................................... 269Electronic stability program
(ESP) ........................................... 271
Active body control (ABC) ............275
Level control system ...................... 276
Parking assist (Parktronic) ..........279
What you should know
at the gas station .......................284
Check regularly
and before a long trip ...............287
Instrument cluster displayMalfunction and indicator
lamps in the
instrument cluster ....................290
On-board diagnostic system .....290
Check engine malfunction
indicator lamp .............................290
Brake warning lamp ..................292
Supplemental restraint
system (SRS)
indicator lamp .............................293
Fuel reserve warning .................293
ABS malfunction
indicator lamp .............................294

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.

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.

74 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.
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)
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

81 Seats
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Power head restraints, rear
The switches are located on the front and rear center
console.
Turn electronic key in starter switch to position 1 or 2.
Activate switch:
1Place head restraints upright.
2Fold head restraints backward.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:
Both head restraints fold up or back together.
The head restraints will position themselves
automatically when the seats are occupied (seat belt
buckled).

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.

89 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Self-test BabySmart
TM without special child seat
installed
After turning electronic key in starter switch to
position 1 or 2, the 7 indicator lamp located on the
center console comes on for approx. 6 seconds and then
extinguishes.
If the indicator lamp should not come on or is
continuously lit, the system is not functioning. You must
see an authorized Mercedes-Benz Center before seating
any child on the front passenger seat. See page 296 for
notes on the 7 indicator lamp.
BabySmart
TM is a trademark of Siemens Automotive Corp.
Wa r n i n g !
The BabySmart
TM airbag deactivation system will
ONLY work with a special child seat designed to
operate with it. It will not work with child seats
which are not BabySmart
TM compatible.
Never place anything between seat cushion and
child seat (e.g. pillow), since it reduces the
effectiveness of the deactivation system.Follow the manufacturer’s instructions for
installation of special child seats.The passenger front airbag will not deploy only if
the 7 indicator lamp remains illuminated.Please be sure to check the indicator every time
you use the special system child seat. Should the
light go out while the restraint is installed, please
check installation. If the light remains out, do not
use the BabySmart
TM restraint to transport children
on the front passenger seat until the system has
been repaired.

92 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Airbags
Front airbags1Driver airbag
2Front passenger airbag
The most effective occupant restraint system yet
developed for use in production vehicles is the seat belt.
In some cases, however, the protective effect of a seat
belt can be further enhanced by an airbag.
In conjunction with wearing the seat belts, the driver
and front passenger airbags can provide increased
protection for the driver and front passenger in certain
frontal impacts exceeding preset thresholds.
Side impact and head protection window curtain airbags
can provide increased protection to belted occupants on
the impacted side of the vehicle in side impacts
exceeding its preset threshold.
The operational readiness of the airbag system is
verified by the indicator lamp “SRS” in the instrument
cluster when turning the electronic key in starter switch
to position 1 or 2. If no fault is detected, the lamp will go
out after approximately 4 seconds; after the lamp goes
out, the system continues to monitor the components
and circuitry of the airbag system and will indicate a
malfunction by coming on again. If the lamp does not
2
1