64 11 200 Removing And Installing/Renewing Heating Unit

64 11 200 Removing and installing/renewing heating unit

Special tools required:







WARNING:
Avoid contact with refrigerant and refrigerant fluid.
Follow safety information for handling R 134a tetrafluorethane refrigerant.
Follow safety information for handling refrigerant fluid.







WARNING:
Follow notes for repair work on cooling system.







Necessary preliminary work:
- Draw off refrigerant from air conditioning system
- Remove support for dashboard
- Remove intake filter housing
- Only N47: Remove right charge-air duct







Unlock and detach coolant lines (1).

Carefully blow through twin pipes to remove remaining coolant from heater core.

Slacken nut (2).

Tightening torque 64 11 4AZ.

Disconnect refrigerant lines (3).

Installation note:
Replace sealing rings.

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

Ensure gasket (4) is correctly seated.

Vent cooling system and check for watertightness.







Remove holder (1).
Remove heater (1) with a 2nd person helping.

Installation note:
Heater is held by support for dashboard.

When installing support for dashboard, make sure heater is in correct position.







Installation note:
Make sure heater is correctly seated on condensate drain (1).