General Repair Information

General Repair Information


Before working on electrical system (wiring), remove relevant fuse(s).

• Disconnect battery before starting electric welding work on vehicle.

Refrigerant circuit of A/C system must not be discharged and opened. Refer to=> [ Refrigerant Circuit, Draining ] Refrigerant Circuit, Draining unless this is necessary because of safety precautions, refer to (=> [ Refrigerant Circuit Repair Safety Precautions ] Refrigerant Circuit Repair Safety Precautions) or unless components of the refrigerant circuit of the A/C system have to be to replaced.

When performing all other usual vehicle repair work, the refrigerant circuit of the A/C system should remain closed.

Servicing operations that can be performed on the heating and air conditioning system without opening the refrigerant circuit are described in => [ Refrigerant Circuit Component Overview ] Refrigerant Circuit Component Overview.

• The connections for the senders/switches described in this Workshop Manual are fitted with a valve which closes automatically when the switches are unscrewed. These switches can thus be replaced in any Audi and VW workshop even though the refrigerant circuit is fully charged.

Service work on the A/C system that requires the refrigerant circuit to be discharged and thus cannot be performed in every Audi and VW workshop are described from => [ Refrigerant Circuit Repairs ] Refrigerant Circuit Repairs. Certain tools are required to discharge the refrigerant circuit, these work procedures must only be performed by trained personnel as well. Therefore, bring vehicle to a workshop that has the necessary tools and in which the work can be performed accordingly by qualified personnel if necessary.

• Contact corrosion. Refer to => [ Contact Corrosion ] Service Precautions.

• Parking heater information if heat output is poor. Refer to=> [ Parking Heater Information if Heat Output is Poor ] Symptom Related Diagnostic Procedures.