MERCEDES-BENZ C-CLASS 1999 Repair Manual

Cellular Telephone

The vehicle is prepared for the installation of a cellular telephone. For further information and
installation contact your authorized Mercedes-Benz dealer.


Warning !
Some jurisdictions prohibit the driver from using a cellular telephone while driving a vehicle.
Whether or not prohibited by law, for safety reasons, the driver should not use the cellular
telephone while the vehicle is in motion. Stop the vehicle in a safe location before answering
or placing a call.


ProCarManuals.com

Drinking and Driving



Warning !
Drinking and driving can be a very dangerous combination. Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and judgement. The possibility of a serious or even fatal accident is
sharply increased when you drink and drive. Please don't drink and drive or allow anyone to drive after
drinking.


Parking Brake
To engage, firmly depress parking brake pedal. When the electronic key is in steering lock position 2, the brake
warning lamp in the instrument cluster should come on brightly. To release the parking brake, pull handle on
instrument panel. The brake warning lamp in the instrument cluster should go out. A warning sounds, if you start
to drive without having released the parking brake. Also see Brake Warning Lamp Test in Index.


Driving Off
Apply the service brakes to test them briefly after driving off. Perform this procedure only when the road is clear
of other traffic. Warm up the engine smoothly. Do not plac e full load on the engine until the operating temperature has
been reached. When starting off on a slippery surface, do not allow one drive wheel to spin for an extended period.

Warning !
Keep driver's foot area clear at all times. Object s stored in this area may impair pedal movement.


ProCarManuals.com

Automatic Transmission

The automatic transmission selects individual gears automatically, dependent upon
• Selector lever position
• Program mode selector
• Accelerator position
• Vehicle speed

Important !

When parking the car or before working on the vehicle with the engine running, firmly depress the parking brake
pedal and shift the selector lever into "P".


Driving
The selector lever is automatically locked while in position "P". To move the selector lever out of position "P", the
service brake pedal must be firmly depressed before the shift lock will release. Shift selector lever to the desired
position only when the engine is idling normally and the service brake is applied. Do not release the brake until
ready to drive. The vehicle may otherwise start creeping when the selector lever is in drive or reverse position.

Warning !
It is dangerous to shift the selector lever out of "P" or "N" if the engine speed is higher than idle speed. If
your foot is not firmly on the brake pedal, the car could accelerate quickly forward or in reverse. You
could lose control of the car and hit someone or something. Only shift into gear when the engine is idling
normally and when your right foot is firmly on the brake pedal.

Important !
After selecting any driving position from "N" or "P", wait a moment to allow the gear to fully engage before
accelerating, especially when the engine is cold.


Accelerator Position
Partial throttle = early upshifting = normal acceleration
Full throttle = later upshifting = rapid acceleration
Kickdown (depressing the accelerator beyond full throttle) = downshifting to a lower gear = maximum acceleration.
Once the desired speed is attained, ease up on t he accelerator - the transmission shifts up again.




Selector Lever Positions

The automatic gear shifting process can be adapted to specific operating
conditions using the selector lever.

P - Parking position.
The parking position is to be used when parking t he vehicle. Engage only with the car stopped. The parking
position is not intended to serve as a brake when the vehicle is parked. Rather, the driver should always use
the parking brake in addition to placing the selector lever in park to secure the vehicle.

Note:
The electronic key can be removed from the steering lo ck only with the foot off the brake pedal and the selector
lever in position "P". With the electronic key removed, the selector lever is locked in position "P".


R - Reverse gear. Shift to reverse gear only with the car stopped.
N - Neutral.
No power is transmitted from the engine to the rear axle. When the brakes are released, the vehicle can be
moved freely (pushed or towed). Do not engage "N" while driving except to coast when the vehicle is in danger of
skidding (e.g. on icy roads, see Winter driving Instructions in Index).





ProCarManuals.com

Important !
Coasting the vehicle, or driving for any other reason with selector lever in "N" can result in transmission damage
that is not covered by the Mercedes-Benz Limited Warranty.


D - The transmission automatically upshifts through 5th gear . Position "D" provides optimum driving characteristics
under all normal operating conditions.
4 - Upshift through 4th gear only.
Suitable for performance driving. To shift from position "D" to "4", push selector lever to the left.
3 - Upshift through 3rd gear only.
Suitable for moderately steep hill s. Since the transmission does not shift hi gher than 3rd gear, this gear selection
will allow use of the engine's braking power downhill.
2 - Upshift through 2nd gear only.
For driving in mountainous regions or under extreme operating conditions. This gear selection will allow use of the
engine's braking power when descending steep grades.
1 - In this position, the engine's
braking effect is utilized by shifting into 1 st gea r. Use this position while descending very steep or lengthy
downgrades and only at speeds below 40 mph (60 km/h).


Important !
With selector lever in position "D", "4" or "3", upshifting from 1st to 2nd to 3rd gear is delayed depending on vehicle
speed and engine temperature. This allows the catalytic converter to heat up more quickly to operating temperatures.
During the brief warm-up period this delayed upshift and increased engine noise might be perceived as a malfunction.
However, neither the engine nor transmission are negatively affected by this mode of operation.
The delayed upshift is effective with vehicle speeds below 31 mph (50 km/h) at partial throttle and engine
temperatures below 95°F (35°C). To avoid overrevving the engi ne when the selector lever is moved to a lower driving
range, the transmission will not shift to a lower gear as l ong as the vehicle speed exceeds the speed limit of that gear.
To prevent the engine from laboring at low RPMs, do not allow the engine speed to drop too low on uphill gradients.
Depending on the degree of the incline, shift selector feve r to a lower gear range early enough to maintain engine
RPM within the best torque range.

Warning!

On slippery road surfaces, never downshift in order to obtain braking action. This could result in rear wheel
slip and reduced vehicle control. Your vehicle's AB S will not prevent this type of loss of control.

Maneuvering
To maneuver in tight areas, e.g. when pulling into a parki ng space, control the car speed by gradually releasing the
brakes. Accelerate gently and never abr uptly step on the accelerator. To rock a car out of soft ground (mud or snow),
alternately shift from forward to reverse, while applying slight partial throttle. Rocking a car free in this manner may
cause the ABS malfunction indicator lamp to come on. Turn off and restart the engine to clear the malfunction
indication.

Stopping
For brief stops, e.g. at traffic lights, leave the transmission in gear and hold vehicle with the service brake. For longer
stops with the engine idling, shift into "N" or "P" and hold t he vehicle with the service brake. When stopping the car on
an uphill incline, do not hold it with the accelerator, use the brake. This avoids unnecessary transmission heat build
up.

Warning !

Getting out of your car with the selector lever not fully engaged in position "P" is dangerous. Also, when
parked on an incline, position "P" alone may not pr event your vehicle from moving, possibly hitting people
or objects. Always set the parking brake in addition to sh ifting to position "P". When parked on an incline,
also turn front wheel against curb.

ProCarManuals.com

Program Mode Selector Switch
The transmission is provided with a selector switch for Standard "S" and Winter/Wet
(snow and ice) "W" program modes.



Important !
Always be certain of the program mode se lected since the vehicle driving characteristics change with the selection of
the program mode.


S Standard mode
Press switch on symbol "S". Use this mode for a ll regular driving. The vehicle starts out in 1st gear.
W Winter/Wet (snow and ice) mode Press switch on symbol "W". The vehicle starts out in 2nd gear, except
lever in 1st gear, or with accelerator pedal in kick-dow n position. The "W" mode helps to imp upshifts occur at lower
vehicle and engine speeds than in the "S" program mode.


Caution !
Never change the program mode? when the selector lever is out of position "P". It could result in a change of driving
characteristics for which you may not be prepared.

Emergency Operation (Limp Home Mode)
If vehicle acceleration worsens, or the transmission no longe r shifts, the transmission is most likely operating in Limp
Home Mode which engages when there is a malfunction at the transmission. This condition may be accompanied by
the "CHECK ENGINE" malfunction indicator lamp in the instrument cluster coming on.
In this mode only the 2nd gear or reverse gear can be activated.

To engage 2nd gear or reverse:
1 . Stop the vehicle.
2 . Move selector lever to position "P".
3 . Turn off the engine.
4 . Wait 10 seconds.
5 . Restart the engine.
6 . Move selector lever to position "D" (for 2nd gear), or move selector lever to position "R" (for reverse gear).

Have the transmission checked at your authorized Mercedes-Benz dealer as soon as possible.


ProCarManuals.com

Cruise Control



Cruise Control
Any given speed above approximately 22 mph (35 km/h) can be maintained with the cruise control by operating the
lever.
1. Accelerate and set:
Lift lever briefly to set speed. Hold lever up to accelerate.
2. Decelerate and set:
Depress lever briefly to set sp eed. Hold lever down to decelerate.
Normally the vehicle is accelerated to the desired speed with the accelerator. Speed is set by briefly pushing
the lever to position 1 or 2. The accelerator can be released. The speed can be increased (e.g. for passing)
by using the accelerator. As soon as the accelerator is released, the previously set speed will be resumed
automatically. If a set speed is to be increased or decreased slightly, e.g. to adapt to the traffic flow, hold lever in
position 1 or 2 until the desired speed is reached, or br iefly tip the control lever in the appropriate direction for
increases or decreases in 0.6 mph (1 km/h) increment s. When the lever is released, the newly set speed remains.
3. Canceling
To cancel the cruise control, briefly push lever to position 3.
When you step on the brake or the vehicle speed drops below approx. 22 rnph (35 km/h), for example when driving
upgrade, the cruise control will be canceled. If the cruise control cancels by itself and remains inoperative until the
engine is restarted, have the syst em checked at your authorized Mercedes-Benz dealer as soon as possible.
4. Resume
If the lever is briefly pushed to position 4 when drivi ng at a speed exceeding approx. 22 mph (35 km/h), the vehicle
resumes the speed which was set prior to the cancella tion of the cruise control. The last memorized speed is
canceled when the key in the steering lock is turned to position 1 or 0.



Note:
If the engine does not brake the vehicle sufficiently while dr iving on a downgrade, the speed you set on the cruise
control may be exceeded and you may have to step on the brake pedal to slow down.
As soon as the grade eases, the cruise controlled speed w ill again be maintained as long as the brakes were not
previously applied, or the lever may be used to resume the previously set speed if the brakes were applied.


Caution !
Moving gear selector lever to position "N" switches the cruise control off.

Warning !
Only use the cruise control if the traffic and weather conditions make it advisable to travel at a steady speed.
• The use of cruise control can be dangerous on winding roads or in heavy traffic because conditions do not
allow safe driving at a steady speed.
• The use of cruise control can be dangerous on slippery roads. Rapid changes in tire adhesion can result
in wheel spin and loss of control.
The "Resume" function should only be operated if the driv er is fully aware of the previously set speed and
wishes to resume this particular preset speed.


ProCarManuals.com

Charge Indicator Lamp
Should the charge indicator lamp fail to come on prior to starting when the electronic key is in steering lock position 2
or should it fail to go out after starting or during operati on, this indicates a fault which must be repaired at an
authorized Mercedes-Benz dealer immediately.
If the charge indicator lamp comes on while the engine is ru nning, this may indicate that the poly-V-belt has broken.
Should this condition occur, the poly-V-bel t must be replaced before continuing to operate the vehicle. Otherwise, the
engine will overheat due to an inoperative water pump which may result in damage to the engine.
Do not continue to drive the vehicle with the charge indicator lamp illuminated. Doing so could result in serious engine
damage that is not covered by the Mercedes-Benz Limited Warranty.

Low Engine Oil Level Warning Lamp
With the electronic key in steering lock position 2, the o il level warning lamp comes on. It should go out immediately
when the engine is running.
If the warning lamp does not go out after starting the engi ne, or comes on with the engine running and at operating
temperature, the engine oil level has dropped to approximately the minimum mark on the dipstick.
When this occurs, the warning lamp will first come on intermittently and then stay on if the oil level drops further.
If no oil leaks are noted, continue to drive to the nearest service station where the engine oil should be topped to the
"full" mark on the dipstick with an approved oil.
The low engine oil level warning light should not be ignored. Extended driving with the light illuminated could result in
serious engine damage that is not covered by the Mercedes -Benz Limited Warranty. In addition to the warning lamp,
the engine oil level should be periodically checked with the di pstick (or via the odometer display - Model 280 only), for
example during a fuel stop, or before a long trip (see Index)


ProCarManuals.com

Engine Oil Consumption
Engine oil consumption checks should only be made after the break-in period. During the break-in period, higher oil
consumption may be noticed and is normal. Frequent driving at high engine speeds results in increased consumption.


Fuel Reserve and Fuel Cap Placement Warning Lamp
With the electronic key in steering lock position 2, the fuel reserve warning lamp comes on. It should go out
immediately when the engine is running.
If the warning lamp does not go out after starting the engine, or if it comes on while driving, it indicates that the fuel
level is down to the reserve quantity of approximately 2.1 gal (8 liters).
The warning lamp blinks when the fuel c ap is not closed, or a fuel system leak has been detected. Retighten cap and
see if lamp goes out.
If the warning lamp continues to blink after closing the fuel cap correctly, hav e the fuel system checked at your
authorized Mercedes-Benz dealer as soon as possible.
Leaving the engine running and the fuel cap open can cause the "Check Engine" lamp to illuminate).


Tachometer
Red marking on tachometer: Excessive engine speed. Avoid th is engine speed, as it may result in serious engine
damage that is not covered by the Mercedes-Benz Limited Warranty. For engine protection, the fuel supply is
interrupted if the engine is operated within the red marking.


Seat Belt Warning Lamp
With the electronic key in steering lock position 2, the warning lamp comes on, and a warning sounds for a short time
if the drivers seat belt is not fastened. After starting the engine, the warning lamp blinks for a brief period to remind
the driver and passengers to fasten seat belts.


ProCarManuals.com

Outside Temperature Indicator
The temperature sensor is located in the front bumper area. Due to its location, the sensor can be affected by road or
engine heat during idling or slow driving. This means that the accuracy of the displayed temperature can only be
verified by comparison to a thermometer placed next, to the sensor, not by comparison to external displays (e.g. bank
signs etc.).
Adaptation to ambient temperature takes place in steps and depends on the prevailing driving conditions (stop-and-
go or moderate, constant driving) and amount of temperature change.

Warning !
The outside temperature indicator is not designed to serve as an Ice-Warning Device and is therefore un-
suitable for that purpose. Indicated temperatures just above the freezing point do not guarantee that the road
surface is free of ice.


Coolant Temperature Gauge
If the antifreeze mixture is effective to -22°F (-30°C), the boiling point of the c oolant in the pressurized cooling system
of your vehicle is approx. 266°F (130°C). During severe operating conditions and stop-and-go city traffic, the coolant
temperature may rise close to the red marking. The engine should not be operated with the coolant temperature in
the red zone. Doing so may cause serious engine damage wh ich is not covered by the Mercedes-Benz Limited
Warranty.

Warning !
• Driving when your engine is badly overheated can cause some fluids which may
have Beaked into the engine compartment to catch fire. You could be seriously
burned.
• Steam from an overheated engine can cause serious burns and can occur just by
opening the engine hood. Stay away from the engine if you see or hear steam
coming from it.
Turn off the engine, get out of the car and do not stand near the car until it cools down.


ProCarManuals.com

Low Engine Coolant Level Warning Lamp
With the electronic key in steering lock position 2, the warning 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, then the coolant level has dropped below the required level. If
no leaks are noticeable and the engine temperature does not increase, continue to drive to the
nearest service station and have coolant added to the coolant system (see Index).
The low engine coolant level warning light should not be ignored. Extended driving with the light
illuminated may cause serious engine damage not co vered by the Mercedes-Benz Limited Warranty.
In cases of major or frequent minor coolant lo ss, have the cooling system checked at your
authorized Mercedes-Benz dealer as soon as possible.

Note:
Do not drive without coolant in the cooling sy stem. The engine will overheat causing major engine
damage. Monitor the coolant temperature gauge while driving.

Warning !

Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may
burn if it comes into contact with hot engine parts. You can be seriously burned.


Low Windshield and Headlamp Washer System Fluid Level Warning Lamp
With the electronic key in steering lock position 2, the warning 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, the level of the reservoir has droppe d to approx.1/4 of the total volume. The reservoir
should be refilled with MB Windshield Washer Concentrate "S" and water (or commercially available
premixed windshield washer solvent/antifreeze, depending on ambient temperature - see Index) at
the next opportunity. The reservoir for the windshie ld and headlamp washer systems is located in
the engine compartment.


ProCarManuals.com