Mercedes C-Class

W203 since 2000 of release

Repair and car operation

+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
- Cooling and heating systems
   - Cooling system
      Antifreeze - means of protection from freezing
      Replacement of cooling liquid - general comments
      Removal and replacement of hoses of system of cooling
      Removal and thermostat installation
      Thermostat check
      Check of system of cooling under pressure
      Removal and installation of the pump of cooling liquid
      Removal and fan installation
      Removal and radiator installation
   + Systems of ventilation, heating and air conditioning
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Removal and installation of the pump of cooling liquid

4-cylinder petrol engine

The pump of cooling liquid is located in front of the block of cylinders and is actuated through klinoremenny transfer.



1. Merge cooling liquid, address to appropriate section.
2. Remove the air filter, address to the Section Removal and installation of the air filter.
3. Engine 111.955: remove the holder of the air filter.
4. Weaken a bolt of fastening of a pulley of the pump of cooling liquid. Thus hold a pulley from a provorachivaniye, having clamped maple a belt.
5. Remove maple a belt, address to the Section Removal and installation of a maple belt.
6. Disconnect and remove a pump pulley.
7. Remove hoses from the pump. Previously weaken collars and shift back.
8. Remove the pump from the block of cylinders.

 Mark the provision of the bolts having various length.

9. Clear interfaced surfaces.



1. Establish into place the pump with new laying and fix it bolts.
2. Further installation is carried out in sequence, return to removal. Fix a pulley the moment 10Нм.
3. Fill system of cooling with liquid and remove from system air, address to appropriate section.

Petrol engine 112

Remove the tension device of a maple belt with the shock-absorber.

Diesel engines


Here differences from the petrol engine are described only.

1. Wring out a screw-driver a cover of the central bolt of fastening of a rejecting roller of a maple belt. Disconnect rejecting roller.

The bolt of fastening of the pump of cooling liquid is behind a rejecting roller.

2. Remove a fuel hose from the shutdown valve, address also to the Section Replacement of the fuel filter.
3. Disconnect the pump of cooling liquid.

The pump is fixed by bolts of various length therefore at removal it is necessary to mark the provision of bolts by a marker.

4. Clear interfaced surfaces.