64 52 523 Removing and Installing/Replacing A/C System Compressor

64 52 523 Removing And Installing/replacing A/C System Compressor (S63)

Special tools required:







WARNING:
Danger of injury.
Refrigerant circuit is under high pressure.
Avoid contact with refrigerant and refrigerant fluid.
Read and comply with safety instructions:
- Handling R 134a refrigerant
- Handling refrigerant fluid







IMPORTANT:
Risk of damage.
Restart engine only when A/C system has been correctly filled.
Read and comply with notes on replacing compressor.
Follow instructions for opening and replacing parts in refrigerant circuit.
If Air conditioning system is opened for more than 24 hours:
Replace desiccant insert for A/C system.







Necessary preliminary tasks:
- Drain off air conditioning system
- Remove A/C compressor drive belt
- Remove tank venting valve
- Remove right front wheel
- Remove front underbody protection
- Remove steering gear cover







Release screw (1).
Tightening torque 64 53 5AZ.
Remove intake pipe (2) from exhaust tailpipe holder (3).







Release screws (1).
Remove expansion tank for charge air cooler (2) and put to one side.







Release screws (1).
Tightening torque 64 53 3AZ.
Remove refrigerant line from condenser (2).

Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.







Unscrew nuts (1).
Tightening torque 51 11 05AZ.
Pull module carrier and coolant radiator in direction of arrow to create sufficient space for subsequent compressor removal.

IMPORTANT:
Risk of damage
Protect cooling fins for subsequent compressor removal by covering them with an aluminium sheet, for example.







Release screw (1) on holder (2).
Take off holder (2).
Tightening torque 17 22 03AZ.
Release nuts (3) on holders for pressure lines (4).
Remove holders for pressure lines (4).
Tightening torque 32 41 07AZ.







Release screws (1).
Tightening torque 64 52 03AZ.







IMPORTANT: Seal openings or lines on compressor with special tool 32 1 270 to prevent escape of media and fouling.







NOTE: Secure compressor (5) against falling out.

Disconnect plug connection (2).
Release screws (1).
Tightening torque 64 52 03AZ.
Lower compressor (5).
Release screws (3) and (4) and remove refrigerant lines.

Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.

Tightening torque 64 52 01AZ.
Carefully feed out compressor (5) toward the front.







After Installation note:
- Evacuate and fill A/C system

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