2001 MERCEDES-BENZ C320 steering

268 Malfunction and indicator lamps
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Malfunction and indicator lamps
in the instrument cluster
General information:
If a bulb in the instrument cluster fails to light up
during the bulb self-check when turning the electronic
key in steering lock to position 2, have it checked and
replaced if necessary.
Emission control
Certain systems of the engine serve to keep the toxic
components of the exhaust gases within permissible
limits required by law.
These systems, of course, will function properly only
when maintained strictly according to factory
specifications. Any adjustments on the engine should,
therefore, be carried out only by authorized
Mercedes-Benz Center qualified technicians. Engine
adjustments should not be altered in any way. Moreover,
the specified service jobs must be carried out regularly
according to Mercedes-Benz servicing requirements.
For details refer to the Service Booklet.On-board diagnostic system
Check engine malfunction indicator lamp
Engine malfunction indicator lamp. If the
“CHECK ENGINE” malfunction indicator
lamp comes on when the engine is running,
it indicates a malfunction of the fuel management
system, emission control system, systems which impact
emissions, or the fuel cap is not closed tight (check the
fuel cap). If the “CHECK ENGINE” lamp is illuminated
continuously and the vehicle is driving normally, you
Wa r n i n g !
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon monoxide,
and inhaling it can cause unconsciousness and
lead to death. Do not run the engine in confined areas (such as a
garage) which are not properly ventilated. If you
think that exhaust gas fumes are entering the
vehicle while driving, have the cause determined
and corrected immediately. If you must drive under
these conditions, drive only with at least one
window fully open.

288 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
TELEPHONE – FUNCTION
* C = Category, see page 274.The display appears if button í or ì on the
multifunction steering wheel is pressed and the vehicle
is not equipped with a telephone.TELE AID
* C = Category, see page 274.
1 The Tele Aid system consists of three types of response; automatic
and manual emergency, roadside assistance and information. With
this message displayed, one or more functions may not be
avai lable.
See page 220 for notes on the Tele Aid.If a malfunction is indicated as outlined above, have the
system checked at the nearest Mercedes-Benz Center as
soon as possible.
Line 1 Line 2 C*
FUNCTION NOT AVAILABLE! 3
Line 1 Line 2 C*
TE L E A I D V I S I T WO R KS H O P !
1
1

292 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
STEERING WH. ADJUST
* C = Category, see page 274.For locking the manual steering wheel adjustment,
seepage77.ENTRANCE POSITION
* C = Category, see page 274.Wait until the seat and steering wheel have moved to
their driving positions. The display will clear when they
have done so.
See also page 41 for easy-entry/exit feature.
Line 1 Line 2 C*
STEERING WH. AD JU ST LOCK! 1
Line 1 Line 2 C*
ENTRANCE POSITION DO NOT DRIVE! 1

321 Towing the vehicle
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Note:
If engine does not run after several unsuccessful
starting attempts, have it checked at the nearest
authorized Mercedes-Benz Center.
Excessive unburned fuel may damage the catalytic
converter.Towing the vehicle
Wa r n i n g !
Prior to towing the vehicle with all wheels on the
ground, make certain that the electronic key is in
starter switch position 2.If the electronic key is left in the starter switch
position 0 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 electronic key
from starter switch and reinsert.

324 Towing the vehicle
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Use wheel lift, dolly, or flat bed equipment, with
electronic key in starter switch turned to position 0.
Note:
To signal turns while being towed with hazard warning
flasher in use, turn electronic key in starter switch to
position 2 and activate combination switch for left or
right turn signal in usual manner – only the selected
turn signal will operate.Upon canceling the turn signal, the hazard warning
flasher will operate again.
Caution!
If the vehicle is towed with the front axle raised, the
engine must be shut off (electronic key in starter switch
position 0 or 1). Otherwise, the ESP will immediately be
engaged and will apply the rear wheel brakes.
Switch off the tow-away alarm (see page 39) as well as
the ESP (see page 260).
Wa r n i n g !
With the engine not running, there is no power
assistance for the braking 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.

337 Replacing wiper blade insert
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Replacing wiper blade inserts
For safety reasons, remove electronic key from steering
lock before replacing the wiper blades, otherwise the
motor can suddenly turn on and cause injury.
Notes:
Do not open engine hood with wiper arm folded forward.
Do not allow the wiper arm to contact the windshield
glass without a wiper blade inserted. The glass may be
scratched or broken.
Make certain that the wiper blades are properly
installed. Improperly installed wiper blades may cause
windshield damage.
Removal:
Fold wiper arm forward. Press safety tab down (1), push
wiper blade downward (2) and remove.

339 Contents - Vehicle care
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar careIndex
Vehicle careCleaning and care of
the vehicle ..................................340
Power washer .............................. 341
Tar stains ..................................... 341
Paintwork, painted body
components ................................. 341
Engine cleaning ..........................342
Vehicle washing .........................342
Ornamental moldings ................343
Headlamps, taillamps, turn signal
lenses ...........................................343Window cleaning ....................... 343
Wiper blade ................................ 343
Light alloy wheels ..................... 344
Instrument cluster ..................... 344
Steering wheel and gear selector
lever ............................................. 344
Cup holder .................................. 344
Seat belts ..................................... 345
Headliner and shelf below rear
window ........................................ 345
Leather upholstery .................... 345
Hard plastic trim items ............. 345
Plastic and rubber parts ........... 345

344 Cleaning and care of the vehicle
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar careIndex
Light alloy wheels
Mercedes-Benz approved Wheel Care should be used for
regular cleaning of the light alloy wheels.
If possible, clean wheels once a week with Mercedes-
Benz approved Wheel Care, using a soft bristle brush
and a strong spray of water.
Follow instructions on container.
Note:
Use only acid-free cleaning materials. The acid could
lead to corrosion.Instrument cluster
Use a gentle dishwashing detergent or mild detergent
for delicate fabrics as a washing solution. Wipe with a
cloth moistened in lukewarm solution. Do not use
scouring agents.
Steering wheel and gear selector lever
Wipe with a damp cloth and dry thoroughly or clean
with Mercedes-Benz approved Leather Care.
Cup holder
Use a gentle dishwashing detergent or mild detergent
for delicate fabrics as a washing solution. Wipe with a
cloth moistened in lukewarm solution. Do not use
scouring agents.