Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car

Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
- 5. Cooling system
   + 5.2. Cooling liquid
   5.3. Antifreeze for a radiator
   5.4. Temperature regulator of cooling liquid (thermostat)
   5.5. Check of the cooling system
   5.6. Hydraulic coupling of the fan
   5.7. Pump of system of liquid cooling
   5.8. Radiator
   5.9. Fan casing
   5.10. Diagnostics of malfunctions of the cooling system
   5.11. Diagnostics of malfunctions of system of indication of level of liquid
   5.12. Engine overheat
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electrical circuitries

5.3. Antifreeze for a radiator

GENERAL INFORMATION

The cooling system a round code is filled with the mix consisting of water, antifreeze and anticorrosive means. This mix prevents emergence of the damages connected with freezing and corrosion influence, formation of limy deposits and, besides, slightly increases temperature of boiling of cooling liquid. Thanks to a carving cover on a compensation tank, at the heated-up engine in the cooling contour the excessive pressure about 1,4 bars which promotes temperature increase of boiling of cooling liquid too is created. The increased temperature of boiling of cooling liquid is required for normal functioning of the cooling system of the engine. At too low temperature of boiling of liquid it can give to thermal a subtime because of what circulation of cooling liquid is broken and cooling of the engine decreases. Therefore the cooling system within a year has to be surely filled with mix of the cooling concentrates.

Prevention

Apply only the cooling concentrates resolved for the Mercedes car.

As after a while the anticorrosive component in cooling liquid loses the effective influence, cooling liquid should be replaced every 3 year.

Prevention

If the content of antifreeze in cooling liquid exceeds 55% (corresponds to protection to –45 °C), then protection against a frost decreases and heat removal by the cooling system worsens.

Ratio of compound components in cooling liquid

	MOROZO- FIRMNESS TO	OHLAZH- GIVING CONCENTRATE	WATER	THE GENERAL FILLED IN QUANTITY
Petrol engine
4-cylinder without conditioner	– 37 °C – 45 °C	4,0 l 4,4 l	4,0 l 3,6 l	8,0 l
4-cylinder with the conditioner	– 37 °C – 45 °C	4,5 l 5,0 l	4,5 l 4,0 l	9,0 l
C280	– 37 °C – 45 °C	5,0 l 5,5 l	5,0 l 4,5 l	10,0 l
Diesel engine
2,0 l	– 37 °C – 45 °C	4,0 l 4,4 l	4,0 l 3,6 l	8,0 l
2,0 l with the conditioner	– 37 °C – 45 °C	4,5 l 5,0 l	4,5 l 4,0 l	9,0 l
2,2 l	– 37 °C – 45 °C	3,5 l 3,9 l	3,5 l 3,1 l	7,0 l
2,2/2,5 l with the conditioner	– 37 °C – 45 °C	3,75 l 4,1 l	3,75 l 3,4 l	7,5 l

In our latitudes protection against frosts has to be provided approximately to –30 °C.