S-class W202 Mercedes
1993-2000 of release
Repair and car operation
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
- 5. Cooling system
+ 5.2. Cooling liquid
5.3. Antifreeze for a radiator
5.4. A temperature regulator cooling liquids (thermostat)
5.5. Check of system of cooling
5.6. Hydraulic coupling of the fan
5.7. Pump of system of liquid cooling
5.9. Fan casing
5.10. Diagnostics of malfunctions of system of cooling
5.11. Diagnostics of malfunctions of system of indication of level of liquid
5.12. Engine overheat
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes
By means of the standard control device it is possible to check a leakage of system of cooling and functioning of a safety valve in a carving cover of system of cooling.
SAFETY VALVE OF SUPERFLUOUS PRESSURE
The safety valve is established in a radiator cover. Its task – since a certain superfluous pressure to open system of cooling and by that to create running off conditions in a compensatory tank of superfluous amount of cooling liquid.
THE SENSOR OF INDICATION OF COOLING LIQUID (THE DIESEL ENGINE)
The system of indication of level of cooling liquid generally consists of the sensor in a compensatory tank and a control bulb on the dashboard.
Indication of level of cooling liquid at the working engine warns about too low level of cooling liquid and, thanks to it, about a possible overheat of the engine. As soon as ignition joins, the control bulb is shone within 30 seconds. At the working engine this bulb dies away at once.
Level of cooling liquid in a compensatory tank acts in film by means of a float (551). At low level of cooling liquid in the sensor contact (550) becomes isolated and the control bulb lights up. Depending on a movement mode a control bulb at first it is short-term, and later constantly flashes. If the control bulb flashes, add cooling liquid.