64 52 524 Replacing air conditioning system compressor (N55, with Dynamic Drive)

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Special tools required:

WARNING: Danger of injury!
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety instructions:

Observe SAFETY INFORMATION for handling refrigerant and refrigerant oil.

IMPORTANT: Risk of damage!
Restart engine only when A/C system has been correctly filled.

Read and comply with notes on compressor replacement. See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

Follow notes for OPENING AND REPLACING PARTS in refrigerant circuit.

If Air conditioning is opened for more than 24 h:

Replace DESICCANT INSERT for air conditioning system.

Necessary preliminary work:

DRAWING OFF, EVACUATING AND FILLING THE AIR CONDITIONING are not included in the time value given for this job item
Remove DRIVE BELT FOR ALTERNATOR
Remove INTAKE SILENCER HOUSING .
Remove left CHARGE-AIR DUCT
Remove CHARGE AIR COOLER

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

Unfasten plug connection (1) and disconnect.

Release screws (2) and remove refrigerant lines (3).

Tightening torque 64 52 1AZ .

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 1: Identifying Plug Connection, Screws And Refrigerant Lines

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Release screw (1) at holder for refrigerant lines (2) and pull out, including spacer sleeve.

Fig 2: Identifying Refrigerant Lines And Screw

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Release screw (1).

Tightening torque 64 52 3AZ .

Fig 3: Identifying Screw

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NOTE: Shown with clearance for better clarity.

Release screw (1).

Tightening torque 64 52 3AZ .

Fig 4: Identifying Screw

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

NOTE: Secure compressor (2) against falling off/down.

Release screw (1).

Tightening torque 64 52 3AZ .

Lift out compressor (2).

Fig 5: Identifying Compressor And Screw

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Installation note:

Release screws (1).

Tightening torque 32 41 18AZ .

Remove holder for hydraulic line (2) on power steering pump (3).

Fig 6: Identifying Hydraulic Line, Screws And Power Steering Pump

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Replacement:

Adjust the amount of refrigerant oil in the new compressor. See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

IMPORTANT: Danger of compressor damage!
Danger of customer complaints due to reduced cooling power of the Air conditioning!
Before the installation of the new compressor, it is absolutely necessary to adjust the amount of refrigerant oil in the new compressor!
The notes on refrigerant oil must be observed! See NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR NOT KNOWN) -or- NOTES (AMOUNT OF REFRIGERANT OIL OF NEW COMPRESSOR KNOWN) .

After installation:

EVACUATE AND FILL A/C SYSTEM