Auxiliary Air Conditioner: Service and Repair

Removing And Installing Auxiliary Air-Conditioning Unit

Tools







Preliminary work
1. Drain engine coolant.
2. Remove rear side trim panel.

Removing auxiliary air-conditioning unit

NOTE: For vehicles with four-zone air conditioning (2+2), the auxiliary air-conditioning unit is located behind the left rear side section cover for the auxiliary air-conditioning unit.







ATTENTION:
Danger of injury from contact with the refrigerant
- Observe safety regulations when working with refrigerant.

1. Remove refrigerant by suction.
2. Press together the air duct from above and pull out of the air-conditioning unit.







3. Press the release on the electrical plug -A--arrow a- and pull off plugs -A- and -B-.







4. Unscrew the fastening screws -1- and tilt the auxiliary air-conditioning unit inwards on the top side.







5. Press together the spring band clamps for the coolant hoses on the heat exchanger with the mounting pliers for spring band clamps, Cayenne hose connections 72-1-arrows A- and pull off the coolant hoses from the heat exchanger -arrows B-.







6. Unscrew the fastening screw for the suction line in the upper bracket (not on the expansion valve at the bottom) -1-.







7. Remove the suction line and close with plugs.
8. Unscrew the fastening screw for the pressure line in the upper bracket (not on the expansion valve at the bottom) -1-.







9. Remove the pressure line and seal with plugs.
10. Raise auxiliary air-conditioning unit and pull off water drain.







11. First pull auxiliary air-conditioning unit inward -arrow- and pull out with the coolant hoses and the air-conditioning lines.







Installing auxiliary air-conditioning unit
1. Position the auxiliary air-conditioning unit.







2. Push the coolant hoses onto the heat exchanger -arrows A- and attach with the spring-band clamps -B-.







3. Remove the plugs on the suction line and pressure line, check the O-rings of the refrigerant lines, and replace if in doubt.







4. Place the suction line and pressure line on the connection -arrow and screw down the fastening screw -1-. Tightening torque: 12 (9.0 ftlb.) Nm.
5. Hold auxiliary air-conditioning unit and connect water drain. Ensure that the water drain remains connected to the drain when fitting the auxiliary air-conditioning unit.







6. Press the auxiliary air-conditioning unit on the side wall and screw down the three fastening screws -4-. Tightening torque: 8 (6.0 ftlb.) Nm.







7. Push on the electrical plug -A- and -B- until plug is felt to engage.







8. Push the air duct into the auxiliary air-conditioning unit until the air duct engages.







Subsequent work
1. Fill in refrigerant.
2. Top up engine coolant.
3. Install rear side trim panel.
4. Install left rear wheel housing liner.
5. Install rear left wheel.