power steering MERCEDES-BENZ C320 2004 W203 Owner's Manual

31 Getting started
Unlocking
Starter switch positionsStarter switch0For removing SmartKey
The steering is locked when the
SmartKey is removed from the starter
switch. If necessary, move steering
wheel slightly to allow the locking
mechanism to engage.
1Power supply to some electrical
consumers, such as seat adjustment
2Ignition (power supply for all electrical
consumers) and driving position
3Starting position
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch and lock
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. Unsupervised use of vehicle
equipment may cause an accident and/or
serious personal injury.iVehicles with automatic transmission:
The SmartKey can only be removed
from the starter switch with the gear
selector lever in positionP.
!If the SmartKey cannot be turned in the
starter switch, the battery may not be
sufficiently charged.

Check the battery and charge it if
necessary (
page 323).


Get a jump start (
page 326).
To prevent accelerated battery
discharge and a possible dead battery,
always remove the SmartKey from the
starter switch when the engine is not in
operation.

32 Getting startedAdjusting
AdjustingSeats
The seats can be adjusted either manually
or electrically, depending on the vehicle’s
equipment.Warning!
G
All seat, head restraint, steering wheel, and
rear view mirror adjustments, as well as fas-
tening of seat belts, must be done before
the vehicle is put into motion.Warning!
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 re-
clined 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 up-
right position and belts are properly posi-
tioned on the body. Your seat must be
adjusted so that you can correctly fasten
your seat belt (
page 40).
Never place hands under the seat or near
any moving parts while a seat is being ad-
justed.
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, 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 ve-
hicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Warning!
G
Children 12 years old and under must never
ride in the front seat, except in a
Mercedes-Benz authorized BabySmart
TM1

compatible child seat, which operates with
the BabySmart
TM system installed in the ve-
hicle to deactivate the passenger front air-
bag when it is properly installed. Otherwise
they will be struck by the airbag when it in-
flates 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 seat-
ing 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 and top tether strap, or secured via
lower anchors and top tether strap, fully in
accordance with the child seat manufactur-
er’s instructions.
1BabySmart
TM is a trademark of Siemens
Automotive Corp.

35 Getting started
Adjusting
Power seat* adjustment
The seat adjustment switches are located
in each front door.
1Head restraint height
2Seat height
3Seat cushion tilt
4Seat fore and aft adjustment
5Seat backrest tilt
Turn the SmartKey in the starter switch
to position1 or2 (
page 31).
or

Open the driver’s or front passenger
door.Seat fore and aft adjustment

Press switch forward or backward in
direction of arrow4.
Adjust seat to a comfortable seating
position that still allows you to reach the
accelerator/brake pedal safely. The posi-
tion should be as far rearward as possible,
consistent with ability to properly operate
controls.Seat cushion tilt

Press switch up or down in direction of
arrow3 until your upper legs are
lightly supported.
Seat backrest tilt

Press switch forward or backward in
direction of arrow5 until your arms
are slightly angled when holding the
steering wheel.
Seat height

Press switch up or down in direction of
arrow2.
Head restraint height

Press switch up or down in direction of
arrow1.
iWhen moving the seat, be sure that
there are no items in the footwell or
behind the seat. Otherwise you could
damage the seat.
The memory function* (
page 99) lets
you store the setting for the seat posi-
tion together with the settings for the
steering wheel and exterior rear view
mirrors.

50 Getting startedParking and locking
Parking and lockingYou have now completed your first drive.
You have properly stopped and parked
your vehicle. End your drive as follows.
Parking brake
1Release handle
2Parking brake
Step firmly on parking brake2.
When the engine is running, the
warning lamp; (USA only)
or3(Canada only) in the
instrument cluster will be illuminated.
Warning!
G
Wait until the vehicle is stationary before
removing the SmartKey from the starter
switch. The vehicle cannot be steered when
the SmartKey is removed.Warning!
G
With the engine not running, there is no
power assistance for the brake and steering
system. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle.
Warning!
G
Do not park this vehicle in areas where com-
bustible materials such as grass, hay or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
To reduce the risk of personal injury as a re-
sult of vehicle movement, before turning off
the engine and leaving the vehicle always:

Keep right foot on brake pedal.


Firmly depress parking brake pedal.


Move the gear selector lever to
positionP (manual transmission: first or
reverse gear).


Slowly release brake pedal.


When parked on an incline, turn front
wheels towards the road curb.


Turn the SmartKey to starter switch
position0 and remove.


Take the SmartKey and lock vehicle
when leaving.

73 Safety and Security
Driving safety systems
Braking
At the instant one of the wheels is about to
lock up, a slight pulsation can be felt in the
brake pedal, indicating that the ABS is in
the regulating mode.
Keep firm and steady pressure on the
brake pedal while experiencing the
pulsation.
Continuous steady brake pedal pressure
yields the advantages provided by the ABS,
namely braking power and ability to steer
the vehicle.
The pulsating brake pedal can be an
indication of hazardous road conditions
and functions as a reminder to take extra
care while driving.Emergency brake maneuver

Keep continious full pressure on the
brake pedal.
For more information, see “Practical hints”
(
page 274).
BAS
The Brake Assist System (BAS) operates in
emergency situations. If you apply the
brakes very quickly, the BAS automatically
provides full brake boost, thereby poten-
tially reducing the braking distance. Apply
continuous full braking pressure until the
emergency braking situation is over. The
ABS will prevent the wheels from locking.
When you release the brake pedal, the
brakes function again as normal. The BAS
is then deactivated.
Warning!
G
The ABS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking or steering efficiency
beyond that afforded by the condition of the
vehicle brakes and tires or the traction. The
ABS cannot prevent accidents, including
those resulting from excessive speed in
turns, following another vehicle too closely,
or hydroplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The
capabilities of an ABS equipped vehicle
must never be exploited in a reckless or
dangerous manner which could jeopardize
the user’s safety or the safety of others.

100 Controls in detailMemory function*The memory button and stored position
button are located on the door.
1Memory button
2Stored position button
Make sure the ignition is switched on
or the relevant door is open and the
SmartKey is inserted in the starter
switch.
Storing positions into memory
Adjust the seats, steering wheel and
rear view mirrors to the desired posi-
tion (
page 32).

Turn button2 to selected memory
position.

Press memory button1.

Release memory button and push
button2 within three seconds.
All the settings are stored at the
selected position.
Recalling positions from memory
Turn button2 to selected memory
position.

Press and hold button2 until the seat,
steering wheel and rear view mirrors
have fully moved to the stored posi-
tions.iReleasing the button immediately
stops movement to the stored posi-
tions.Warning!
G
Do not operate the power seats using the
memory button if the seat backrest is in an
excessively reclined position. Doing so
could cause damage to front or rear seats.
First move backrest to an upright position.

239 Operation
Driving instructions
Driving instructions
Drive sensibly – save fuel
Fuel consumption, to a great extent,
depends on driving habits and operating
conditions.
To save fuel you should:

Keep tires at the recommended infla-
tion pressures.


Remove unnecessary loads.


Remove roof rack when not in use.


Allow engine to warm up under low
load use.


Avoid frequent acceleration and decel-
eration.


Have all maintenance work performed
at the intervals specified in the Service
Booklet and as required by the FSS.
Contact your authorized
Mercedes-Benz Center.
Fuel consumption is also increased by
driving in cold weather, in stop-and-go
traffic, on short trips and in hilly country.
Drinking and driving
PedalsPower assistance
Warning!
G
Drinking and driving and/or taking drugs
and driving are very dangerous combina-
tions. Even a small amount of alcohol or
drugs can affect your reflexes, perceptions
and judgement.
The possibility of a serious or even fatal
accident are greatly increased when you
drink or take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or
taking drugs.
Warning!
G
Keep driver’s foot area clear at all times.
Objects stored in this area may impair pedal
movement.Warning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle.

282 Practical hintsWhat to do if …Display message
Possible cause
Possible solution
ESP
ESP
NOT AVAILABLE!
The ESP was deactivated because of a
malfunction or interrupted power supply.
The ABS might not be operational.

Synchronize the ESP. With vehicle
stationary and the engine running, turn
the steering wheel completely to the
left and then to the right to synchro-
nize the ESP.
If the ESP message does not go out:

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions
increases the risk of an accident.
The self-diagnosis has not been
completed.
The display will clear after driving a short
distance at more than 12 mph (20 km/h).
!When synchronizing the ESP, make
sure you can turn the steering wheel in
both directions as far as it will go
without the wheels hitting any objects,
e.g. a road curb.

298 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
_
STEERING WHEEL ADJ.
LOCK!
The steering column is not properly
locked.

Lock steering column (
page 37).
STEERING OIL
VISIT WORKSHOP!
The steering gear oil level is too low.
There is a danger of steering gear
damage.

Have the system checked by an
authorized Mercedes-Benz Center.
Warning!
G
If the level of steering gear oil in reservoir is
too low, the steering power assistance could
fail. Much greater effort will then be needed
to turn the steering wheel.
Do not add steering oil without checking the
steering system.
Do not drive the vehicle. Have the system
checked at your authorized Mercedes-Benz
Center as soon as possible.

329 Practical hints
Towing the vehicle
!
To be certain to avoid a possibility of
damage to the drive train, however, we
recommend the drive shaft be discon-
nected at the rear axle drive flange
(vehicles with 4MATIC: disconnected at
the front and rear axle drive flanges) for
any towing beyond a short tow to a
nearby garage.
Warning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the power
supply or in the vehicle’s electrical
system
as that will be necessary to adequately
control the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make certain that the SmartKey
is in starter switch position2.
If the SmartKey is left in starter switch
position0 for an extended period of time, it
can no longer be turned in the switch. In this
case, the steering is locked. To unlock,
remove SmartKey from starter switch and
reinsert.
iTo signal turns while being towed with
the hazard warning flasher in use, turn
SmartKey in starter switch to
position2 and activate the combina-
tion switch for the left or right turn
signal in the usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the
hazard warning flasher will operate
again.