Heating / Fresh Air Control

Removal
1. Remove covers over heating and fresh-air control, battery and fluid reservoir. Disconnect battery and remove.
2. Remove steering wheel and loosen steering- column panel. Comply with safety regulations when handling airbag units.






3. Loosen central screw (clamp) at the steering column switch from below and pull forward a little. Remove top cover and disconnect electrical plug connections. Remove steering-column switch.






4. Loosen instrument panel and unclip right side upwards. Disconnect electrical plug connections.






5. Remove steering-column cover (4 screws).






6. Remove radio and heating and fresh-air control. Unclip switch trim on the left and right. Disconnect electrical plug connection. Loosen centre of fixing frame and remove.
7. Remove left side nozzle and disconnect electrical plug connection. Unclip cover of sun sensor and defroster panel and remove.
8. Loosen passenger compartment monitor and disconnect electrical plug connection.
9. Remove bottom right air guide. Remove passenger airbag unit.
Comply with safety regulations when handling airbag units.
10. Remove front cover of centre console. Loosen fuse carrier and loosen diagnosis plug in the left footwell.






11. Loosen dashboard on the bottom, centre, left and right. Carefully remove dashboard and pull off speaker cable.






12. Loosen centre tunnel support at the top of supporting frame and loosen bottom tunnel holder.
13. Remove left air guide. Just loosen defroster duct. Loosen centre air distributor housing and remove.
14. Disconnect electrical plug connection from heating and fresh-air control.






15. Loosen battery positive connection at the current distributor and current distributor at the firewall cover.
16. Clamp shut both heater hoses in front of the heat exchanger with a commercially available hose clamp. Loosen heating hoses at the heat exchanger and plug the connections.
17. Loosen heating and fresh-air control at the cover firewall (3 nuts).






18. Loosen holder of heating and fresh-air control on the upper right of the passenger side.
19. Carefully lower heating and fresh-air control into the footwell and remove. Do not damage electrical plug connections or cable.

Installation
1. Ensure correct seating of air-distributor housing and air guides. Engage electrical plug connections and route electrical cables carefully (do not jam).
2. Comply with safety regulations when handling airbag units.






3. Adjust steering-column switch:
Measure with a depth gauge between end of steering shaft and steering column switch cover plate (see figure).
Adjustment dimension 55 ± 0.5 mm

4. Replace gasket between current distributor and firewall if necessary. After the current distributor is mounted on the firewall (tightening torque 15 Nm (11 ft lb.)) the battery cable is tightened with a new hexagon nut M8.
Tightening torque 15 Nm (11 ft lb.).

5. The heat exchanger is connected to the engine cooling system and coolant flows through it when the engine is running. After removing or installing the heating and fresh-air control, vent the cooling system.