Note. When working on a car with an air conditioning system and working with R 134a refrigerant, observe safety regulations and instructions for working on the refrigerant circuit. Do not start the engine if the refrigerant lines are not connected to the compressor and the openings in the compressor are plugged (danger of overheating in the internal lubrication circuit). If the refrigerant circuit is disconnected, it is not necessary to replace the dehydrator. When disconnecting the ground wire from the battery, follow the disconnection procedure.
1. Expansion valve
2. Coupling for refrigerant lines - low pressure circuit; nut, 8 Nm; replace after separating the seal
3. Coupling for refrigerant lines - high pressure circuit; nut, 8 Nm; replace after separating the seal
4. Refrigerant recovery and charging valve: High pressure circuit: Only for measuring, charging and recovering refrigerant; cap with seal, must be screwed on
5. Container with liquid with desiccant
6. Outside air temperature sensor "G17": under the front bumper on the left
7. Condenser with receiver and dryer
8. Safety valve (refrigerant overpressure release): replace sealing ring; tightening torque: 10 Nm
9. Air conditioning compressor: with air conditioning compressor regulating valve "N₂80" (cannot be replaced separately)
10. Refrigerant pipe bracket
11. High pressure sensor "G65"
12. Refrigerant recovery valve: low pressure circuit; cap with seal, must be screwed on
13. Refrigerant pipe bracket
14. Air pollution sensor "G238": Climatronic only
15. Refrigerant pipeline with internal heat exchanger; between the condenser and the air conditioner compressor
16. Air quality sensor "G238": only installed in conjunction with Climatronic; can be checked using the Tester in the "Guided Troubleshooting" mode
17. Air intake grille