Heater Unit

Heater Unit

- Remove the heater. Refer to => [ Heater Unit ] Heater Unit.

- Remove add-on components from heater. Refer to=> [ Heater Unit Add-On Components ] Heater Unit Add-On Components.






1 - Air Distribution Housing For Heater

• Do not disassemble further.

• In vehicles without auxiliary air heater heating element (Z35) , the cover for heater core seals the opening for auxiliary air heater heating element.

• If necessary, coat bearing areas and guides of temperature doors thinly with grease (e.g. with G 052 745 A3 )

• Beginning November 2007, a heater air distribution housing with a door in the air outlet to the defroster vents in the instrument panel without a side cut-out is gradually being installed. On vehicles not equipped with A/C (just heating) or on vehicles equipped with a manual climate control system, this change has no impact on the heater control or on the manual A/C system (the door is operated by the heater controls and/or the manual A/C). Refer to=> [ Air Distribution Housing Defroster Outlet Door ] Overhaul.

2 - Screw

3 - Air Guide Channel To Left Footwell Vent

• Heater version.

4 - Heat Core For Heater Unit

• Removing and installing, refer to => [ Heater Core ] Heater Core.

5 - Sealing Ring

• Replacing.

• Coat thinly with coolant and insert on proper side. Refer to=> [ Heater Core ] Heater Core.

6 - Clip

• Replacing.

• Ensure it is seated correctly.

• Removing and installing, refer to => [ Heater Core ] Heater Core.

7 - Screw

• Tightening specification 2.5 Nm

8 - Coolant Pipes

• Disconnect and connect from heater core. Refer to=> [ Heater Core ] Heater Core.

9 - Foam Spacer

• Installed between grommet and heater.

10 - Grommet

• Insert into the bulkhead before installing the heater, refer to => [ Heater Unit ] Heater Unit.

• Installing, refer to=> [ Heater Unit ] Heater Unit.

11 - Air Guide Channel

• Disassembling and assembling, refer to=> [ Air Guide Channel ] Overhaul.

12 - Dust and Pollen Filter

• Removing and installing, refer to => [ Dust and Pollen Filter ] Service and Repair.

• Follow the replacement intervals.

• As a replacement part, the dust and pollen filter is available in different versions (with and without activated charcoal element). Refer to Electronic Parts Catalog (ETKA).

• Notes on version with activated charcoal element, refer to=> [ Dust and Pollen Filter with Activated Charcoal Insert ] Description and Operation.

13 - Cover For Dust and Pollen Filter

• Removing and installing, refer to => [ Dust and Pollen Filter ] Service and Repair.

14 - Air Guide Channel To Right Footwell Vent

• Heater version.

15 - Plug

• Installed only in vehicles without air duct to vent in rear center console (vent is not installed at this time, introduction not yet finalized).