Heating and Ventilation Unit, Removing and Installing

Heating And Ventilation Unit, Removing And Installing

Preparation:
Special tools, testers and auxiliary items required







- Drip tray for VAS6100 VAS 6208







- Hose clamps, up to 40 mm. 3093
- Compressed air gun, commercially available

CAUTION:
- Switch off all electrical consumers.
- Switch ignition off and remove ignition key.

NOTE: To improve accessibility, additional components e.g. engine cover must be removed (depending on engine version).

- Remove instrument panel
- Remove facing wall in plenum chamber
- Remove left and right rear footwell channels
- Place Drip tray for VAS6100 VAS 6208 under the engine.







- Mark coolant hoses - 1 -

CAUTION:
- Scalding danger.
- The cooling system is pressurized when the engine is warm. Wear gloves and other protection and carefully release system pressure if necessary before performing repairs.

- Clamp off coolant hoses - 1 - using Hose clamps, up to 40 mm. 3093 and disconnect coolant hoses to heater core.
- Using a compressed air gun, carefully blow residual coolant from heater core at heater core connection.
- Cover floor carpet in vehicle interior with leak-proof foil and absorbent paper.

NOTE: Take note during removal of the length and assignment of screws for reinstallation







1. Bolt
- 4 Nm
2. Screws
- Qty. 2
- 4 Nm
3. Cable bracket
4. Heating and ventilation unit

Removing:
- Disconnect electrical connections from heating and ventilation unit.

NOTE: All cable ties opened or cut during removal must be reinstalled at the same locations during installation.

- Remove screws from bracket.
- Remove supports and.
- Remove screws and and remove bracket.
- Remove screws and from cable bracket.
- When removing heat unit, ensure the two coolant pipes of the heater core do not get caught and bent or damaged on plenum chamber or sound insulation pan.
- Also pay attention to wiring harness, individual wiring connections may get damaged when pulling too forcefully on wiring harness.
- Remove heating and ventilation unit.

Installing:
Install in reverse order of removal, noting the following.

NOTE: Assistance of a second mechanic is necessary to install heating and ventilation unit.

- When inserting heating and ventilation unit, have second mechanic guide both coolant pipes to heater core through the seal (from engine compartment).
- Fill with coolant.

5. Bracket
6. Screws
- 8 Nm
7. Assembly carrier
8. Right support
9. Left support
10. Screws
- Qty. 2
- 8 Nm
11. Bracket
12. Screws
- Qty. 2
- 8 Nm







Heating and ventilation unit seal at bulkhead, installation position
- First install seal - A - on bulkhead, then engage on heater core.

NOTE: To prevent ingress of water into vehicle interior, note installation position.