Vehicle Maintenance Mercedes C-Class (W202)

Maintenance intervals
The vehicle should be serviced every 12 months. If the vehicle has traveled more than 15,000 km during this period, the service should be performed after 15,000 km....

After 12 months or 15,000 km
•• Engine: oil and filter change. •• Cooling system and heating system: checking the fluid level, checking the concentration of antifreeze. Visual inspection of the...

Additionally, every 60,000 km
•• Steering: Tighten the mounting bolts on the steering gear to the specified torque. •• Automatic transmission: oil and filter change. •• Cardan shaft: checking the...

Every 2 years
•• Brake fluid: replacement. •• Sliding roof panel: cleaning and light lubrication of guide rails and floating pads. •• Checking the body for damage to the varnish...

Every 3-4 years
Every 3 years •• Coolant: replacement. Additionally after every 90,000 km or after 4 years •• Fuel filter: replacement. •• Air filter: replacing the filter element.

Maintenance work
Grouped by the various vehicle design groups, all maintenance work that must be carried out in accordance with the maintenance plan is described below. Accordingly,...

Engine and exhaust system
The following maintenance items must be performed according to the maintenance schedule. •• Engine: oil and filter change. •• Engine: visually check for oil leaks. ••...

Engine oil change
To change the engine oil, you will need the following tools: inspection pit or hydraulic car jack with support trestles; set of replacement socket heads for removing the...

Checking the condition of the V-belt
The V-belt must not be further tightened. It must be checked for damage as part of maintenance. 1. Turn off the ignition. 2. Mark the belt on a clearly visible side with...

Replacing spark plugs
Special tool required: spark plug socket wrench driver, e.g. HAZET 2776. The following wearing parts must be purchased: 4 or 6 matching spark plugs. 1. Remove the spark...

Checking electrical connections
1. Check that all electrical connections on the ignition coils are securely seated. 2. Replace damaged clamps. 3. The contacts should not be wet, otherwise clean the...

Lubrication of the throttle control system
4-cylinder petrol engine 6-cylinder petrol engine 2.0L Diesel Engine Diesel engine 2.2/2.5 l 1. Lubricate all bearing areas of the adjusting lever, spherical heads, and...

Checking the coolant level
The coolant level outside of maintenance should also be checked before each relatively long trip. For topping up, even in warm weather, use only a mixture of antifreeze...

Air Conditioner: Checking the Refrigerant Level
Warning! Do not open the refrigerant circuit in the air conditioner. The refrigerant contains substances that can cause frostbite when in contact with the skin. 1. Clean...

Replacing the fuel filter / coarse filter
This does not require any special tools. The necessary wearing part is the fuel filter and coarse fuel filter for the respective engine. Fuel filter 1. Unscrew the...

Replacing the air filter element
No special tool is required for replacement. The following quickly wearing part needs to be purchased: replacement air filter element. When purchasing it, pay attention...

Checking the exhaust system
1. Raise the car. 2. Check the tightness of the mounting clamps. 3. Shine a light and inspect the exhaust system for holes, rusted parts, and areas of harmful contact....

Gearbox / final drive
•• Manual gearbox and differential: visual inspection for leaks. •• Half shafts: check for leaks and damage in the protective covers of the joints. •• Automatic...

Visual inspection of tightness
Possible leak locations are: the point of separation between the engine block and the gearbox (flywheel seal/gearbox shaft seal); driveshaft for gearbox; threaded oil...

Checking the oil level in the differential
The differential oil level should only be checked if leaks were found in this area during a visual inspection. There is no need to change the oil in the rear axle...

Checking the driveshaft joint discs
1. Raise the car. 2. If necessary, remove the lower engine compartment cover. 3. Using a lamp, visually inspect the front and rear hinge discs for wear, damage, and...

Checking the rubber seals of the axle shafts
1. Raise the car. 2. Shine a lamp on the rubber of the cuffs and check for porosity and cracks. Replace cracked cuffs immediately. 3. If the cuff is pulled inward or...

Front axle / steering
•• Front axle joints: check play and fastening, check dust caps. •• Steering: check for play, check bellows for leaks and damage. Tighten the mounting bolts on the...

Checking the front axle joints
1. Raise the front of the car. 2. Shine a light on the left and right axial joint dust caps (7) and check them for damage, paying attention to traces of grease on and...

Checking the steering wheel free play
1. Set the steering wheel to the center position. 2. Turn the steering wheel back and forth through the open window. The steering wheel can have a maximum free play of a...

Tightening the mounting bolts on the steering gear
1. Raise the front of the car. 2. Remove the lower engine compartment cover. 3. Tighten the steering gear safety mounting bolts (7) to the body base to a torque of 70...

Checking the oil level in the steering gear
Checking the oil level in the power steering gear 1. Unscrew the screw plug and remove the cover from the receiver. 2. The oil level, if the oil is cold (ambient...

Brakes / tires
•• Disc brake mechanism: check the thickness of the friction linings of the front and rear brake pads. Check the condition of the brake disc. •• Check the brake fluid...

Checking the thickness of the brake pad friction linings
1. Mark the position of the wheels in relation to their hubs with paint. This will allow the balanced wheel to be reinstalled in its original position. Loosen the wheel...

Checking the brake fluid level
The brake fluid reservoir is located in the engine compartment. It is divided into two chambers, one for each brake circuit. The screw cap has a ventilation hole, which...

Checking the brake fluid level indicator light
1. Turn on the ignition. 2. Release the parking brake. 3. Press down both contacts (1) and (2) one by one with your finger. 4. The assistant checks whether the signal...

Visual inspection of brake lines
1. Raise the car. 2. Clean the brake lines with a low temperature cleaner. Caution! The brake lines are coated with a synthetic polymer film to protect against...

Replacing brake fluid
Only for vehicles without All Wheel Slip Regulation (ASR) system. Special tool required: round wrench for loosening exhaust device bolts; transparent plastic hose....

Checking the tread pattern of a tire (tire)
Tires of balanced wheels wear approximately evenly over the entire tread path, provided that the prescribed inflation pressure is strictly observed, the wheels are...

Checking the valve of an air tube or tire
1. Unscrew the dust cap from the valve. 2. Apply a small amount of soapy water to the valve. If a soap bubble forms, tighten the valve firmly with the screw-on dust cap....

Checking the pressure in inflated tires
Check the pressure in inflated tires only when the tire is cold. Check the pressure once a month and also as part of maintenance. Additionally, the pressure in inflated...

Body / interior lighting
•• Replace the dust filter element. •• Lubricate the hood latch and hinge. •• Check the seat belts for damage. •• Sliding roof panel: Clean and lightly lubricate the...

Replacing the dust filter nozzle
The dust filter cannot be cleaned. The filter must be replaced every time as part of maintenance. The dust filter is installed behind the fan. 1. Remove the ventilation...

Lubrication of the bonnet
1. Lubricate the safety hook with oil. 2. Lubricate the hood latch with general purpose grease.

Checking seat belts
Warning! The noises that occur when the seat belt webbing is wound up are caused by the operation of the device. If disturbing noises occur, the only option is to...

Lubricating the sunroof
Special tool required: two centering bolts, which can be made independently according to the dimensions shown in the figure; special pliers or similar tool. Necessary...

Tools used for maintenance
The cost of purchasing the tool is fully justified by the volume of repair work that needs to be done on a Mercedes. In addition to the basic equipment, we recommend...

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TEXTHTMLBB Code

190 (W201) (1982-1993)