Caution | Remove the appropriate fuse(s) before working on wiring. |
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Note | It is only permissible if so required by the pertinent safety regulations ( → Chapter), or if parts of the air conditioner refrigerant circuit have to be replaced, to drain and open the air conditioner refrigerant circuit → Chapter. |
| The air conditioner refrigerant circuit must remain closed during all other normal vehicle repair steps. |
| Service work which can be performed on the heater and air conditioner without opening the refrigerant circuit is described in this Workshop Manual → Chapter. |
Note | 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 therefore be replaced at any workshop without draining the refrigerant circuit. |
| Air conditioner service work for which the refrigerant circuit has to be drained and which therefore cannot be performed at all workshops is described as of → Chapter. Draining of the refrigerant circuit requires the use of specific tools and such work is also only to be performed by qualified personnel. For this reason, it may be necessary to take the vehicle to a workshop which is equipped with the necessary tools and at which the work can be performed by appropriately qualified personnel → Air conditioner with refrigerant R134a. |
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