warning MERCEDES-BENZ C-Class 2000 W202 Service Manual

Exterior Lamp Failure indicator Lamp
With the electronic key in steering lock position 2, an exterior lamp comes on. It should go out when the engine is
running. If the warning lamp does not go out after starting the engine, or if it comes on while driving, this lamp
indicates a failure in the parking lamp, taillamp, stop la mp, or low beam headlamp. If an exterior lamp fails, the
indicator lamp will come on only when that lamp is switched on. If a brake lamp fails, the lamp failure indicator will
come on when applying the brake and stay on until the engine is turned off.

Note:
If additional lighting equipment is installed (e.g. auxiliary headl amps etc.) be certain to connect into the fuse before
the failure indicator monitoring unit in order to avoid damaging the system.


Brake Pad Wear Indicator Lamp
With the electronic key in steering lock position 2, the brake pad wear indicator lamp comes on .
It goes out when the engine is running.
If the indicator lamp lights up during braking, this indica tes that the brake pads are worn down. Have the brake
system checked at your authorized Mercedes- Benz dealer as soon as possible.


Brake Warning Lamp
With the electronic key in steering lock position 2, the brake warning lamp will come on. It should go out when the
engine is running. The brake warning lamp will come on:
• when there is insufficient brake fluid in the rese rvoir (engine running and parking brake released), or
• when the parking brake is set (engine running).

Warning !
Driving with the brake warning lamp illuminated can result in an accident. Have your brake system checked
immediately if the brake warning lamp stays on. Don't add brake fluid before checking the brake system.
Overfilling the brake fluid reservoir can result in sp illing brake fluid on hot engine parts and the brake fluid
catching fire. You can be seriously burned.

If you find that the minimum mark on the brake fluid reserv oir is reached, have the brake system checked for brake
pad thickness and leaks. To test the brake warning lamp, turn electronic key in steering lock to position 2. The brake
warning lamp comes on, and should go out when the engine is running.

Flexible Service System (FSS)





The FSS permits a flexible service schedule that is directly related to the operating conditions of the vehicle.
The symbol or appears in the main odometer field prior to the next suggested service. Depending on operating
conditions throughout the year, the next service is calculated and displayed in days or distance remaining.
The message is displayed for approx. 10 seconds when turning the electronic key in steering lock to position 2, or
while driving when reaching the service warning threshold. It can be cancelled manually by pressing button 0.
Once the suggested term has passed, the message plus symbol or , preceded by a - (minus symbol) blinks for
approx 20 seconds and a signal sounds every time when turning the electronic key in steering lock to position 2. The
FSS display
can also be called up for approx.10 seconds with display illuminated by pressing button 0 twice within 1 second.
Following a completed service the Mercedes-Benz dealer sets the counter to 10.000 miles (Canada: 15.000 km) and
365 days.

The counter can also be set by any individual. To do so:
1. Turn electronic key in steering lock to position 2.
2. Within 4 seconds press button 0 twice.
3. The present status for days or distance is displayed. Within 10 seconds turn electronic key in steering lock to
position 0.
4. Press and hold button 0, while turning electronic key in steering lock to position 2 again. The present status for
days
or distance is displayed once more. Continue to hold button 0 After approx. 10 seconds a signal sounds, and the
display shows 10 000 miles (Canada: 15000 km) for approx. 10 seconds.
5. Release button 0. If the FSS counter was inadvertently reset, have a Mercedes -Benz dealer correct it.

Notes:
When disconnecting vehicle battery for one or more days at a time, such days will not be counted. Any such days not
counted by the FSS can be added by your Mercedes-Benz dealer. The interval between services is determined by
the kind of vehicle operation. Driving at extreme speeds, and cold starts combined with short distance driving in which
the engine does not reach normal operating temperature, reduce the interval between services.

Model C 230 Kompressor:
The FSS allows for distances between 10 000 miles (Canada: 16 000 krn) and 15 000 miles (Canada: 25 000 km), or
from 365 to 730 days between services.

Models C 280 and C 43 AMG:
The FSS allows for distances between 10 000 miles (Canada: 15 000 km) and 20 000 miles (Canada: 30 000 km), or
from 365 to 730 days between services. However you choose to set your reference numbers, the scheduled services
as posted in the Service Booklet must be followed to properly care for your vehicle.

Antilock Brake System (ABS)

Important !
The ABS improves steering control of the vehicle during braking maneuvers. Do not pump the brake pedal, rather use
firm, steady brake pedal pressure. Pu mping the brake pedal defeats the pur pose for ABS and significantly reduces
braking effectiveness.
The ABS prevents the wheels from locking up above a vehicl e speed of approximately 5 mph (8 km/h) independent of
road surface conditions.
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.
On slippery road surfaces, the ABS will re spond even with light brake pedal pressure because of the increased
likelihood of locking wheels. The pulsating brake pedal can be an indication of hazardous road conditions and
functions as a reminder to take extra care while driving.

ABS Control
The ABS malfunction indicator lamp in the instrument cl uster comes on with the electronic key in steering lock
position 2 and should go out when the engine is running.
If the charging voltage falls below 10 volts, the malfunction indicator lamp comes on and the ABS is switched off.
When the voltage is above this value again, the malfunction indicator lamp should go out and the ABS is operational.
With the ABS malfunctioning, the ASR or ESP, if vehicl e so equipped, are also switched off. Both malfunction
indicator lamps come on with the engine running. If the ABS malfunction indicator lamp does not go out or comes on
while driving, it indicates that the ABS has detected a malfunction and has switched off. In this case, the brake
system functions in the usual manner, but without antilock assistance.
Have the system checked at your authorized Mercedes-Benz dealer as soon as possible.

Warning !
ABS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase the traction
made available by the road conditions. The ABS ca nnot prevent accidents, including those resulting from
excessive speed in turns, following another vehicle too cl osely, or aquaplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The capabilities of an ABS equipped car must never be exploited in a
reckless or dangerous manner which could jeopardize the user's safety or the safety of others.

Note:
To alert following vehicles to slippery road conditions you discover, operate your hazard warning flashers as
appropriate.

Brake Assist System (BAS)

Warning !

BAS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase braking
efficiency beyond that afforded by the condition of the vehicle brakes and tires or the traction afforded.
The BAS cannot prevent accidents, including those resulting from excessive speed in turns, following
another vehicle too closely, or aquaplaning. Only a safe, attentive, and skillful driver can prevent accidents.
The capabilities of a BAS equipped car must never be exploited in a reckless or dangerous manner which
could jeopardize the user's safety or the safety of others.

The Brake Assist System is designed to maximize the vehicle's braking capability during emergency braking
maneuvers by having maximum power boost applied to the br akes more quickly in emergency braking conditions
than might otherwise be afforded solely by the driver's braking style. This can help reduce braking distances over
what ordinary driving and braking style might do. The BAS complements the Antilock Brake System (ABS).
To receive the benefit of the system you must apply continuous full braking power during the stopping sequence.
Do not reduce brake pedal pressure.
Once the brake pedal is released, the BAS is deactivat ed The malfunction indicator lamps for the ASR and ESP are
combined with the BAS malfunction indicator lamp.
The BAS/ASR or BAS/ESP malfunction indicator lamp in the instrument cluster come on with the electronic key in
steering lock position 2 and should go out with the engine running.
If the BAS/ASR or BAS/ESP malfunction indicator lamp comes on permanently while the engine is running,
a malfunction has been detected in either system. As a resul t, it is possible that now only partial engine output will be
available, and pressing the accelerator pedal will require more effort. If the BAS malfunctions. The brake system
functions in the usual manner, but wi thout BAS. If the charging voltage falls be low 10 volts, the malfunction indicator
lamp comes on and the BAS is switched off. When the volt age is above this value again, the malfunction indicator
lamp should go out and the BAS is operational. With t he ABS malfunctioning, the BAS, ASR or ESP are also
switched off.
Both malfunction indicator lamps come on with the engine running. Have the BAS, ASR or ESP checked at your
authorized Mercedes-Benz dealer as soon as possible .

Acceleration Slip Regulation (ASR)
The acceleration slip regulation will engage at all vehicle speeds, if one or both drive wheels begin to lose traction
and spin in acceleration. While engaged, the yellow warning lamp in the speedometer dial flashes. With the
acceleration slip regulation engaged, the brake is applied to the spinning drive wheel until slip is brought under
control. If both drive wheels spin, the brake is applied to both drive wheels and simultaneously, engine torque is
limited, to improve the vehicle's driving stability. As traction on the road surface increases, thus allowing
acceleration without slip, the allowable engine torque also increases again and the brake is no longer applied to
drive wheels.

Important !
If the ASR warning lamp flashes, adapt your speed and driving to the prevailing road conditions.

Caution!
If the vehicle is towed with the front axle raised (see Towing the vehicle in Index), the engine must be shut off
(electronic key in steering lock position 0 or 1). Otherwise, the ASR regulation will immediately be
engaged and will apply the rear wheel brakes.

Notes:
The indicator lamp for the ASR is combined with that of the BAS The yellow BAS/ASR malfunction indicator
lamp in the instrument cluster and the yellow ASR warning lamp in the speedometer dial come on with the
electronic key in steering lock position 2. They should go out with the engine running. If the BAS/ASR malfunction
indicator lamp comes on with the engine running, a malfunction has been detected in either system. Pressing the
accelerator pedal will require greater effort. Only partial engine output will be available.
If the BAS malfunctions, the brake system functions in the usual manner, but without BAS. Have the BAS or ASR
checked at your authorized Mercedes-Benz dealer as soon as possible. With the ABS malfunctioning, the ASR
is also switched off. Driving the vehicle with varied size tires will cause the wheels to rotate at different speeds,
therefore the ASR may activate (yellow ASR warning lamp in speedometer dial comes on).
For this reason, all wheels, including the spare wheel, must have the same tire size. When testing the parking
brake on a brake test dynamometer, the engine must be shut off. Otherwise, the ASR will immediately be engaged
and will apply the rear wheel brakes. In winter operation, the maximum effectiveness of the ASR is only achieved
with Mercedes-Benz recommended M+S rated radial-ply tires and/or snow chains.


ASR Control Switch



ASR control switch located in center console To improve the vehicle's traction when driving with snow chains, or
starting off in deep snow, sand or gravel, press the upper half of the ASR switch. The ASR warning lamp, located
in the speedometer dial, is continuously illuminated. With the ASR system switched off, the engine torque
reduction feature is cancelled. Therefore, the enhanced vehicle stability offered by ASR is unavailable. Adapt your
speed and driving to the prevailing road conditions. A portion of the ASR system remains active, even with the
switch in the OFF position. If one drive wheel loses traction and begins to spin, the brake is applied until the wheel
regains sufficient traction. The traction control engages at vehicle speeds up to approximately 24 mph (40 km/h),
and switches off at 50 mph (80 km/h). Note: Avoid spinning of one drive wheel. Doing so may cause serious damage
to the drive train which is not covered by the Mercedes-Benz Limited Warranty.
The ASR warning lamp, located in the speedometer dial, starts to flash at any vehicle speed as soon as the tires
lose traction and the wheels begin to spin. To return to the enhanced vehicle stability offered by ASR: press lower
half of the switch (the ASR warning lamp in the speedometer dial goes out).


Important!
If the ASR warning lamp flashes:
• during take-off, apply as little throttle as possible,
• while driving, ease up on the accelerator.

Electronic Stability Program (ESP) (optional)
The ESP enhances directional control and reduces driving wheel spin of the vehicle under any driving condition.
Over/understeering of the vehicle is counteracted by applying brakes to the appropriate wheel to create a
counterpointing vehicle movement. The ESP warning lamp, located in the speedometer dial, starts to flash.

Important !
If the ESP warning lamp flashes, adapt your speed and driving to the prevailing road conditions.

Caution !
If the vehicle is towed with the front axle raised (see Towing the vehicle in Index), the engine must be shut off
(electronic key in steering lock position 0 or 1). Otherwise, the ESP will immediately be engaged and will apply
the rear wheel brakes.

Notes:
The indicator lamp for the ESP is combined with that of the BAS. The yellow BAS/ESP malfunction indicator lamp
in the instrument cluster and the yellow ESP warning lamp in the speedometer dial come on with the electronic key
in steering lock position 2. They should go out with the engine running. If the BAS/ESP multifunction indicator lamp
comes on permanently with the engine running, a malfunction has been detected in either system.
Pressing the accelerator pedal will require greater effort. Only partial engine output will be available. If the BAS
malfunctions, the brake system functions in the usual manner, but without BAS. Have the BAS or ESP checked at
your authorized Mercedes-Benz dealer as soon as possible. With the ABS malfunctioning, the ESP is also switched
off. Driving the vehicle with varied size tires will cause the wheels to rotate at different speeds, therefore the electronic
stability program may activate (yellow ESP warning lamp in speedometer dialcomes on).
For this reason, all wheels, including the spare wheel, must have the same tire size. When testing the parking brake
on a brake test dynamometer, the engine must be shut off. Otherwise, the electronic stability program will
immediately
be engaged and will apply the rear wheel brakes. In winter operation, the maximum effectiveness of the ESP is only
achieved with Mercedes-Benz recommended M+S rated radial-ply tires and/or snow chains.

Synchronizing ESP

If the power supply was interrupted(battery disconnected or empty), the BAS/ESP multifunction indicator lamp
may be illuminated with the engine running. Turn steering wheel completely to the left and then to the right. The
BAS/ESP malfunction indicator lamp should go out.

ESP Control Switch




ESP control switch located on center console To improve the vehicle's traction when driving with snow chains, or
starting off in deep snow, sand or gravel, press the upper half of the ESP switch. The ESP warning lamp, located in
the speedometer dial, is continuously illuminated. With the ESP system switched off, the engine torque reduction
feature is cancelled. Therefore, the enhanced vehicle stability offered by ESP is unavailable. Adapt your speed and
driving to the prevailing road conditions. A portion of the ESP system remains active, even with the switch in the OFF
position.
If one drive wheel loses traction and begins to spin, the brake is applied until the wheel regains sufficient traction.
The traction control engages at vehicle speeds up to approximately 24 mph (40 km/h), and switches off at
50 mph (80 km/h).

Note:
Avoid spinning of one drive wheel. Doing so may cause serious damage to the drive train which is not covered by the
Mercedes-Benz Limited Warranty. The ESP warning lamp, located in the speedometer dial, starts to flash at any
vehicle speed as soon as the tires lose traction and the wheels begin to spin. To return to the enhanced vehicle
stability
offered by ESP: press lower half of the switch (the ESP warning lamp in the speedometer dial goes out).

Important !
If the ESP warning lamp flashes:
• during take-off, apply as little throttle as possible,
• while driving, ease up on the accelerator.

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, ther efore, be carried out only by qualified Mercedes-Benz
authorized dealer 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.

Warning !
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.


On-Board Diagnostic System
The Sequential Multiport Fuel Injection (SFI) control module monitors emission control components that either provide
input signals to or receive output sign als from the control module. Malfunctions resulting from interruptions or failure
of any of these components are indica ted by the "CHECK ENGINE" malfunction indicator lamp in the instrument
cluster and are simultaneously stored in the SFI control module. If the "CHECK ENGINE" malfunction indicator lamp
comes on, have the system checked at your authorized Mercedes-Benz dealer as soon as possible. With some
exceptions the control module switches off the "CHECK ENGINE" indicator lamp if the condition, causing the lamp to
come on, no longer exists during three consecutive cycles. An on-board diagnostic connector is located in the
passenger compartment near to the parking brake pedal, allowi ng the accurate identification of system malfunctions
through the readout of diagnostic trouble codes.

Hood






To open:
To unlock the hood, pull release lever (1) under the driver's side of the instrument panel. At the same time handle
(2) will extend out of the radiator grill (it may be necessary to lift the hood up slightly).

Caution !
To avoid damage to the windshield wiper or hood, open the hood only with wiper in the parked position. Pull handle
(2) completely out of radiator grill and open hood (do not pull up on handle).

To close:
Lower hood and let it drop into lock from a height of approx. 1 ft. (30 cm), assisting with hands placed flat on edges
of hood (3). To avoid hood damage, if hood is not fully closed, repeat closing procedure. Do not push down on hood
to attempt to fully close it.

Warning!

To help prevent personal injury, stay clear of moving parts when the hood is open and the engine is running.
Be sure the hood is properly closed before driving. When closing hood, use extreme caution not to catch
hands or fingers. The engine is equipped with a transistorized ignition system. Because of the high voltage it
is dangerous to touch any components (ignition coils, spark plug sockets, diagnostic socket) of the ignition
system
• with the engine running,
• while starting the engine,
• if ignition is "on" and the engine is turned manually.
If you see flames, steam or smoke coming from the engine compartment, or if the coolant temperature
gauge indicates that the engine is overheated, do not open the hood. Move away from vehicle and do not
open the hood until the engine has cooled. If necessary, call a fire department.

Example



Checking Coolant Level
To check the coolant level, the vehicle must be parked on level ground and the engine stopped.
Check coolant level only when coolant is cold.
The coolant level should reach the black top part of the reservoir.


Adding Coolant
If coolant has to be added, a 50/50 mixture of water and MB anticorrosion/antifreeze should be added. The drain
plugs
for the cooling system are located on the right side of the engine block and at the bottom of the radiator.
Anticorrosion/antifreeze, see Coolants in Index.

Warning!
In order to avoid possibly serious burns or injury:
•Use extreme caution when opening the hood if there are any signs of steam or coolant leaking from the
cooling system, or if the coolant temperature gauge indicates that the coolant is overheated.
•Do not remove pressure cap on coolant reservoir if engine temperature is above 194°F (90°C). Allow
engine to cool down before removing cap. The coolant reservoir contains hot fluid and is under pressure.

•Using a rag, slowly open cap approximately 1/2 turn to relieve excess pressure. If opened immediately,
scalding hot fluid and steam will be blown out under pressure.

•Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes
into contact with hot engine parts.