Mercedes S-Class W-140

1991-1999 of release

Repair and car operation



Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
+ Engine
- Systems of cooling, heating
   Specifications
   - System of cooling of the engine
      Replacement of cooling liquid - general comments
      Removal and replacement of hoses of system of cooling
      Thermostat check
      Removal and thermostat installation
      Removal and installation of a radiator of system of cooling - installation details
      Removal and installation of the water pump
   + Systems of ventilation, heating and air conditioning
+ Power supply system and release
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



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System of cooling of the engine

Antifreeze - means of protection from freezing

Do not allow antifreeze hit on open sites of a body and the painted surfaces of the car.

Casual splashes immediately wash away a plentiful quantity of water.

Remember that antifreeze is extremely toxic liquid and its hit in an organism even in small amounts is fraught with the most serious consequences, up to a lethal outcome.

Never leave antifreeze being stored in leaky closed container, immediately collect cooling liquid spilled on a floor.

Remember that the sweetish smell of antifreeze can draw to itself attention of children and animals.

About ways utilization of the fulfilled cooling liquid consult with local authorities, - in many regions of the world special points on different reception of working off are equipped. At all do not merge old cooling liquid in the sewerage and on the earth!

Recently nontoxical grades of antifreeze are developed, nevertheless, they also should to be utilized in the organized order.

Cooling liquid

The system of cooling is all-the-year-round filled with a mix of water, antifreeze and anticorrosive means. It interferes with a rust and corrosion, adjournment of salts and, besides, increases temperature of boiling of cooling liquid. In cooling system because of liquid expansion when heating superfluous pressure is created that also conducts to increase of a boiling point of cooling liquid.

Pressure is limited located in a cover of a broad tank to the valve which opens at pressure 1.4 - 1.6 bar.


For faultless functioning of system of cooling of the engine the increased temperature of boiling of cooling liquid is required. At 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 should be filled with a mix of water and the listed additives to it.