Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car

+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
- Cooling system and heating
   - Cooling system
      Antifreeze - a security measure from freezing
      Replacement of cooling liquid - general comments
      Removal and replacement of hoses of the cooling system
      Removal and installation of the thermostat
      Check of the thermostat
      Check of the cooling system under pressure
      Removal and installation of the pump of cooling liquid
      Removal and installation of the fan
      Removal and installation of a radiator
   + 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 set in motion through klinoremenny transfer.



1. Merge cooling liquid, address appropriate section.
2. Remove the air filter, address 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. At the same time hold a pulley from a provorachivaniye, having clamped maple a belt.
5. Take off maple a belt, address 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 the interfaced surfaces.



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

Petrol engine 112

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

Diesel engines


Here only differences from the petrol engine are described.

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

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

2. Remove a fuel hose from the shutdown valve, address also 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 with a marker.

4. Clear the interfaced surfaces.