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Audi A4, S4
Controls and receptions of safe operation
Current leaving and service
The engine
Systems of cooling, heating and the air conditioner
- Power supply systems, release and decrease in toxicity of the fulfilled gases
    Power supply systems of petrol and diesel engines
    System of injection of fuel of the petrol engine
   - System of injection of fuel of the diesel engine
      The general information
      Operation in the winter
      Checks of system of injection of fuel
    Systems of release and decrease in toxicity of the fulfilled gases. Турбокомпрессор
Systems of an electric equipment of the engine
Manual box of a gear change
Automatic transmission
Coupling, power shafts and differential
Brake system
Suspension bracket and steering
Onboard electric equipment

Operation in the winter

At decrease in temperature of external air fluidity of diesel fuel owing to paraffin loss decreases. Diesel fuel on the fluidity becomes similar to honey and can hammer in the filter. For this reason the additives raising fluidity of fuel and providing possibility of start of the engine at temperature of external air to in the winter can be entered into diesel fuel – 22С.

To exclude забивание the fuel filter at low external temperature, fuel goes to the heat exchanger.