Mercedes S-Class W-220
since 1998 release
Repair and operation of the car
+ Mercedes-Benz cars of the class S (W220)
+ Operation manual
+ Routine maintenance
- 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
+ Systems of ventilation, heating and air conditioning
+ Power supply system and release
+ Engine electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ Schemes of electric equipment
Antifreeze - a security measure from freezingCooling 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 - 1.6 atm. Faultless functioning of the cooling system of the engine requires the increased temperature of boiling of cooling liquid. At a low temperature of boiling the steam stopper therefore circulation of liquid decreases can be formed and cooling of the engine worsens. Therefore the cooling system all the year round surely has to be filled with mix of water and the listed additives to it.
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