Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
- 6. Heating, ventilation
   6.2. The conditioner
   6.3. Additional resistance
   6.4. The heating fan
   6.5. The device of service of heating
   6.6. Diagnostics of malfunctions of system of heating
   6.7. The conditioner: not only "pluses", but also "minuses"
   6.8. Rules of service of the conditioner
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

6. Heating, ventilation

6.1. Introduction

Fresh air for heating gets into car salon through the inlet device under a windscreen. Thus air flows round a heating radiator and through various заслонки is distributed on separate nozzles. If heating is established on "heat" (warm) heating valves in a motor compartment for access to the heat exchanger open. The heat exchanger is in a heating radiator and heats up a hot cooling liquid. Passing by hot panels of the heat exchanger, fresh air heats up and then arrives in car salon.

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

For strengthening of capacity of heating the four-stage fan of heating serves. That having blown at separate steps occurred to various speed, switching on additional resistance is provided. Thanking it the current strength, the fan arriving to the engine decreases, and having blown occurs more slowly. At the highest step of speed обдува additional resistance are disconnected.

If in heating system there is an additional dust filter, catching of a dust, pollen, air pollutions and other microparticles is provided. Switching it is possible to close completely air access outside. Air regulation occurs then through the special air filter in car salon.