64 11 206 Removing and Installing/Renewing Heating Unit

64 11 206 Removing And Installing/renewing Heating Unit







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 (tetrafluorethane) refrigerant
- Handling refrigerant fluid







IMPORTANT:
Risk of damage.
Restart engine only when air conditioning system has been correctly filled.

NOTE: If air conditioning system is open for longer than 24 hours: replace desiccant insert for air conditioning







Necessary preliminary work:
- Drain off air conditioning system
- Remove support for dashboard
- Remove expansion valve







NOTE:
Diesel vehicles only:
Disconnect positive line (1) and plug connection (2) at electric auxiliary heater (3)







NOTE:
Diesel vehicles only:
Fold back carpet in area (2).
Slacken nut (1).
Take off earthing cable (3).







Release plug connection (1) at blower motor (2) and disconnect.







IMPORTANT: Make sure remaining coolant is removed completely.

Carefully blow through aluminium double pipe to remove remaining coolant from heat exchanger for heating system.

Installation note:
Bleeding cooling system and checking for water leaks







IMPORTANT: Risk of soiling by leaking coolant.

Remove heating/air conditioning unit (1) from vehicle.

Installation note:
Make sure that blower housing (2) and sealing plates for media openings (4) in bulkhead (5) are fitted correctly.
Footwell ducts (3) must be fitted correctly in the corresponding connection piece (3).







Installation note:
Make sure condensate drain (1) is correctly seated in grommet (2).
Ensure mat (3) is positioned correctly under the heater.