General Repair Information
Remove the appropriate fuse(s) before working on electrical wires.
Disconnect the battery before performing any electric welding on the vehicle. Refer to BATTERY, DISCONNECTING AND CONNECTING .
The refrigerant circuit for the A/C system may only be discharged and opened when
- it is necessary due to safety precautions. Refer to SAFETY PRECAUTIONS WHEN HANDLING REFRIGERANT .
- it is necessary to remove other components,
- refrigerant circuit components for the A/C system must be removed or replaced.
When performing all other usual vehicle repair work, the refrigerant circuit of the A/C system remains closed.
The connections for the sensors/switches described in this Service Information are fitted with a valve which closes automatically when the switches are removed. These switches can be replaced in any workshop with the refrigerant circuit fully charged.
If it is necessary to discharge and open the A/C system refrigerant circuit for certain repair work on the heating and A/C system, this is described in the respective work procedure. Certain tools are required to discharge the refrigerant circuit. These work procedures may also only be performed by trained personnel. Refer to Refrigerant Circuit (Refrigerant R134a Servicing, Refrigerant Circuit, Working with A/C Service Station) and Working with A/C Service Station (1 Of 2) / Working with A/C Service Station (2 Of 2) .
If the necessary tools are not available or no qualified personnel is present, do not perform repairs on the refrigerant circuit for the A/C system that require the refrigerant circuit to be discharged and opened. If necessary, the vehicle must be transferred to a workshop that has the necessary tools and equipment and where the work can be performed by qualified personnel. There the refrigerant circuit can be discharged and opened corresponding to the legal regulations. Refer to A/C SYSTEM, GENERAL INFORMATION or LAWS AND REGULATIONS