check engine MERCEDES-BENZ C-CLASS 1999 User Guide

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.


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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, at tentive, and skillful driver can prevent accidents. The
capabilities of a BAS equipped car must never be explo ited 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 indicator lamps for the ASR and ESP are combined
with the BAS indicator lamp.
The BAS/ASR or BAS/ESP malfunction indicator lamp in the instrument cluster corne 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 co mes on permanently while the engine is running, a
malfunction has been detected in either system. As a result, 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 .


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Acceleration Slip Regulation (ASR)
The acceleration slip regulation will engage at all vehicle s peeds, if one or both drive wheels begin to lose traction
and spin in acceleration. While engaged, the yellow warni ng 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 spee d and driving to the prevailing road conditions.

Caution !
If the vehicle is towed with the front axle raised (see Towing the vehicle in Index), t he engine must be shut off
(electronic key in steer ing lock position 0 or 1). Othe rwise, the acceleration slip 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 malfunc tion 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 ro tate at different speeds,
therefore the acceleration slip regulation may activate (ye llow ASR warning lamp in speedometer dial comes on).
For this reason, all wheels, including the spare wheel, mu st have the same tire size. When testing the parking
brake on a brake test dynamometer, the engine must be shut off. Otherwise, t he acceleration slip regulation will
immediately be engaged and will apply the rear wheel brakes . In winter operation, the maximum effectiveness of
the acceleration slip regulation is only achieved with Mercedes-Benz recommended M+S rated radialply 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 cont inuously 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 por tion of the ASR system remains active, even with the
switch in the OFF position. If one drive wheel loses traction a nd begins to spin, the brake is applied until the wheel
regains sufficient traction. The traction control engages at vehicle speeds up to approximately 24 rnph (40 km/h),
and switches off at 50 mph (80 km/h).
Note:
Avoid spinning of one drive wheel. Doing so may cause seriou s damage to the drive train which is not covered by the
Mercedes-Benz Limited Warranty.
The ASR warning lamp, located in the speedometer dial, star ts 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.


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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), t he engine must be shut off
(electronic key in steer ing lock position 0 or 1). Otherwise, the el ectronic stability program 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 di al come on with the electronic key
in steering lock position 2. They should go out with th e 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 ti res will cause the wheels to rotate at different speeds, therefore the electronic
stability program may activate (yellow ESP 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, t he electronic stability program will
immediately
be engaged and will apply the rear wheel brakes. In winter operation, the maximum effectiveness of the electronic
stability program is only achieved with Mercedes-Benz reco mmended M+S rated radial-ply tires and/or snow chains.

ESP Control Switch



ESP control switch located on center co
nsole 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 conditio ns. A portion of the ESP system remains ac tive, 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 seriou s damage to the drive train which is not covered by the
Mercedes-Benz Limited Warranty. The ESP warning lamp, located in the speedome ter 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.


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Emission Control
Certain systems of the engine serve to keep the toxic components of the exhaust gases within
permissible limits required by law. These syst ems, of course, will function properly only when
maintained strictly according to factory spec ifications. Any adjustments on the engine should,
therefore, be carried out only by qualified Merc edes-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) c ontrol module monitors emission control components
that either provide input signals to or receive output signals from the control module. Malfunctions
resulting from interruptions or failure of any of these components are indicated by the "CHECK
ENGINE" malfunction indicator lamp in the instrument cluster and are simultaneously stored in the
diagnostic module. If the "CHECK ENGINE" malfunc tion indicator lamp comes on, have the system
checked at your authorized Mercedes-Benz deal er as soon as possible. The control module
switches off the "CHECK ENGINE" indicator lamp if the condition, causing the lamp to come on, no
longer exists. An on-board diagnostic connector is located in the passenger compartment near to the
parking brake pedal, allowing the accurate identificat ion of system malfunctions through the readout
of diagnostic trouble codes.


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Winter Driving
Have your car winterized at your authorized Mercedes-Benz dealer before the onset of winter.
• Change the engine oil if the engine contains an oil which is not approved for winter operation.
For viscosity (SAE/CCMC class) and filling quantity, see Capacities: Fuels, Coolants,
Lubricants etc. in Index.
• Check engine coolant anticorr osion/antifreeze concentration.
• Additive for the windshield washer and headlamp cleani ng system: Add MB Concentrate "S" to a premixed
windshield washer solvent/antifreeze which is form ulated for below freezing temperatures (see Index).
• Test battery: Battery capacity drops with dec reasing ambient temperature. A well charged
battery helps to ensure that the engine can be started, even at low ambient temperatures.
• Tires: We recommend M+S rated radial-ply tires on all four wheels for the winter season. Observe
permissible maximum speed for M+S rated radial-ply tires and the legal speed limit.

Note:
In winter operation, the maximum effect iveness of the acceleration slip regulation or of the electronic traction system
can only be achieved with M+S rated radial-ply tires and/or snow chains recommended by Mercedes-Benz. Snow
chains maximize performance.


Snow Chains
Use only snow chains that are tested and recommended by Mercedes-Benz. Your authorized Mercedes-Benz dealer
will be glad to advise you on this subject. Chains should only be used on the rear wheels. Follow the manufacturer's
mounting instructions. Snow chains should only be driven on snow covered roads at speeds not to exceed 30 mph
(50 km/h). Remove chains as soon as possible when driving on roads without snow. For tips on driving on slippery
winter roads, refer to Index. Vehicles with Acceleration Slip Regulation (ASR) or Electronic Stability Program (ESP):
When driving with snow chai ns, press the ASR or ESP control switch, refer to Index.


Model C 43 AMG

Important!
Use of snow chains is permissible only on winter tire size 215/45 R 17 H M+S. Refer to "Rims - Tires" in section
"Technical Data" (see Index).


Travelling Abroad
Abroad, there is a widely-spread Mercedes-Benz service network at your disposal. If you plan to travel into areas
which are not listed in the index of your dealer directory, you should request pertinent information from your
authorized Mercedes-Benz dealer.



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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.


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:
•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.


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Checking Engine Oil Level
Example



1.
Oil dipstick
2. Oil filler cap

To check the engine oil level, park vehicle on level ground, with engine at normal oper ational temperature. Check
engine
oil level approximately 5 minutes after stopping the engine, allowing for the oil to return to the oil pan.


Oil Dipstick:
Wipe oil dipstick clean prior to checking the engine oil level. Fully insert dipstick in tube, and remove after three
seconds to obtain accurate reading.


Oil level must be between the
lower (min) and upper (max)
mark of the dipstick.



Fill quantity between upper and lower dipstick markin
g level is approximately 2.1 US qt (2.0 I).
Do not overfill the engine.

Excessive oil must be drained or siphoned. It could cause damage to engine and catalytic converter not covered by
the Mercedes-Benz Limited Warranty.
For low engine oil level warning lamp, see Index.


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Odometer Display Field
(Models C 280 and C 43 AMG)

Turn electronic key in steering lock to position 2 and wait until the symbols
and appears in the
odometer display field. Within 1 second press button 0 twice.


The following messages are available:
"OK"
"-1.0 Q" (Canada: -1.0 L)
"-1.5 Q" (Canada: -1.5L)
"-2.0 Q" (Canada: -2.0 L)
Add oil to upper (max) mark of the dipstick."HI"

Do not overfill the engine.
Excessive oil must be drained or siphoned. It could caus e damage to engine and catalytic converter not covered
by the Mercedes-Benz Limi ted Warranty. The symbol
flashes in the odometer field if a proper oil level check
cannot be performed. The oil level check
can be repeated after a short while. Perform the oil level check with the dipstick, if it cannot be completed via the
odometer display field. In this case we recommend that you have the system checked at a Mercedes-Benz dealer.


Automatic Transmission Fluid Level
The transmission has a permanent fill of automatic tran smission fluid. Regular automatic transmission fluid
level checks and changes are not required. For this reason the dipstick is omitted. If you notice fluid leaks or
gear shifting malfunctions, have your authorized Mercede s-Benz dealer check the transmission fluid level.


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Battery

Warning !
Failure to follow these instructions can result in severe injury or death. Never lean over batteries while
connecting, you might get injured. Battery fluid contains sulfuric acid. Do not allow this fluid to come in
contact with eyes, skin or clothing. In case it does, immediately flush affected area with water and seek
medical help if necessary. A battery will also produ ce hydrogen gas, which is flammable and explosive.
Keep flames or sparks away from battery, avoid im proper connection of jumper cables, smoking etc..

Important !
Battery maintenance information:
The battery is located in the trunk under the trunk floor. The fluid level must be checked at every A and B service.
Always insure that the fluid level is at the specified maximum level and that only distilled water is used. Failure to
maintain proper fluid level may result in cell deterioration and possible battery rupture. The service life of the battery is
dependent on its condition of charge. The battery should alwa ys be kept sufficiently charged, in order to last an
optimum length of time.
Therefore, we strongly recommend that you have the battery charge checked frequently, and corrected if
necessary, especially if you use the vehicle less than approximately 200 miles (300 km) per month, mostly for
short distance trips, or if it is not used for long periods of time.
Only charge a battery with a battery charger after the battery has been disconnected from the vehicle electrical circuit.
Always disconnect the battery negative lead first and connect last. When removing and connecting the battery,
always make sure that all electrical consumers are off and the electronic key is in steering lock position 0. The battery
and its vent tube must always be securely installed when the car is in operation. While the engine is running the
battery terminal clamps must not be loosened or detached, otherwise the generator and other electronic components
would be damaged.

Note:
After reconnecting the battery al so resynchronize the Express feature of the power windows
(see Power Windows in Index).

Battery Recycling
Batteries contain materials that can harm the environment with improper disposal. Large 12 Volt storage batteries
contain lead. Recycling of batteries is the preferred method of disposal. Many states require sellers of batteries to
accept old batteries for recycling.


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