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
- 6. Heating, ventilation
   6.2. Conditioner
   6.3. Additional resistance
   6.4. Heating fan
   6.5. Heating service device
   6.6. Diagnostics of malfunctions of system of heating
   6.7. Conditioner: not only "pluses", but also "minuses"
   6.8. Rules of service of the conditioner
+ 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






6. Heating, ventilation

6.1. Introduction

GENERAL INFORMATION

Fresh air for heating gets into interior of the car via the inlet device under a windshield. At the same time air flows round a heating radiator and via various gates is distributed on separate nozzles. If heating is established on "heat" (warm), then heating valves in a motor compartment for access to the heat exchanger open. The heat exchanger is in a heating radiator and heats up hot cooling liquid. Passing by hot panels of the heat exchanger, fresh air heats up and then comes to interior of the car.

Temperature in interior of the car can be established depending on position of the rotary regulator in the left or right half of salon. The electronic monitor in the device of heating regulates time of opening of valves of heating depending on temperature in salon. Behind the heat exchanger and in the device of service there are internal sensors of temperature. Thus, temperature is maintained in the car approximately constant, irrespective of the speed of the movement of the car and external temperature.

For strengthening of power of heating the four-stage fan of heating serves. That having blown at separate steps happened to various speed, switching to additional resistance is provided. Thanks to them current, the fan arriving to the engine decreases, and having blown occurs more slowly. At the highest step of speed of an obduv additional resistance are disconnected.

If in system of heating there is an additional dust filter, catching of dust, pollen, air pollutions and other microparticles is provided. Switching it is possible to close completely air access outside. Regulation of air happens then via the special air filter in interior of the car.