Air Distribution Housing Overview
Air Distribution Housing Overview
• To illustrate air guide in the air distribution housing, it is shown in the form of sectional views A - A and B - B.
• On the heater, the various doors for air distribution are moved together via a flexible shaft and various levers and two curved washers.
1 - Air Distribution Housing
2 - Left Temperature Door (Driver Side)
• Shown in center position.
• Both left and right temperature doors are moved together at heater (separate adjustment for driver and front passenger not possible).
3 - Air Guide To Air Guide Channel To Vent In Rear Center Console and To Center Instrument Panel Vents
4 - Air Guide To Air Guide Channel To Vent In Rear Center Console and To Center Instrument Panel Vents
5 - Right Temperature Door (Front Passenger Side)
• Shown in center position.
• Both left and right temperature doors are moved together at heater (separate adjustment for driver and front passenger not possible).
6 - Left Footwell Door (Driver Side)
• Shown in "closed" position.
7 - Air Guide Channel In The Driver Side Footwell
8 - Air Distribution Housing Sectioned Above Line A - A
9 - Auxiliary Air Heater Heating Element (Z35) (with Auxiliary Air Heater Control Module (J604) )
• The electric auxiliary air heater is available in different versions. On vehicles equipped with a diesel engine built through November 2006 (running change) the control of the auxiliary air heater heating element via the auxiliary air heater control module. Refer to Vehicle diagnosis, testing and information system (VAS5051B) in "Guided Fault Finding" function. On vehicles with Diesel engine manufactured later than November 2006 (running change in production), a 3-stage Auxiliary Air Heater Heating Element (Z35) is installed, which is actuated via a relay by the respective Engine Control Module (ECM). Refer to => [ Auxiliary Air Heater Heating Element (Z35) Activation, Testing (Without A/C) ] Auxiliary Air Heater Heating Element (Z35) Activation, Testing (Without A/C).
10 - Heater Core For Heater Unit
11 - Air Outlet From Air Guide Channel
12 - Right Temperature Door (Front Passenger Side)
• Shown in center position
13 - Right Footwell Door (Front Passenger Side)
• Shown in closed position.
14 - Defroster Door
• Shown in closed position.
• 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.
15 - Air Distribution Housing Sectioned Above Line B - B
16 - Central Door "Center"
• Shown in open position.
17 - Door In Air Guide Channel To Air Guide To Vent In Center Console At Rear
• This door is operated via an actuating arm installed at center central door.
18 - Air Guide Channel To The Air Guide For The Rear Center Console Vents
• This channel is currently sealed with a plug.
• Introduction of a vent in center console has not yet been finalized.