Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car



Mercedes-Benz
+ 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






Antifreeze - a security measure from freezing

Cooling liquid

The cooling system is all the year round filled with mix of water, antifreeze and rust-preventing agent. It interferes with a rust and corrosion, adjournment of salts and, besides, increases temperature of boiling of cooling liquid. In the cooling system because of expansion of liquid when heating excessive pressure is created that also leads to temperature increase of boiling of cooling liquid. Pressure is limited to the valve located in a cover of a broad tank which opens with a pressure of 1.4 - 2.0 atm. For faultless functioning of the cooling system it is required to be insured from boiling of cooling liquid at which the steam stopper therefore circulation of liquid decreases can be formed and cooling of the engine worsens. Temperature of boiling has to be increased. For this purpose the cooling system always has to be filled with mix of water and the listed additives to it.