Air Routing and Distribution In Passenger Compartment
Overview
• Component locations of individual components, refer to => [ Components Inside Passenger Compartment Overview ] Components Inside Passenger Compartment Overview and=> [ A/C Unit and Air Intake Housing Components ] A/C Unit and Air Intake Housing Components.
• The ventilation of the passenger compartment occurs via two air extraction outlets (in luggage compartment right and left near the bumper), refer to => [ Passenger Compartment Forced Air Extraction ] Service and Repair.
• The air guide and the air distribution in the passenger compartment is different on vehicle equipped with the "Comfort" A/C system and the "Basis" A/C system.
• From 01.2008, A/C units which have an additional connection for the glove compartment cooling are being installed. On vehicles without glove compartment cooling, this connection is sealed with a plug. Refer to => [ Glove Compartment Cooling to Air Intake Manifold Connection ] Glove Compartment Cooling to Air Intake Manifold Connection.
• The following illustrations show the location of the components on an Audi A5 Coupe; an Audi A5 Sportback, Audi A4, Audi Q5 etc., the location of the components varies slightly. The description of the components is not different; removing and installing is performed in the same way as on the Audi A5 Coupe.
1 Defroster Vent/Front Window
• Air duct to windshield
• If the intermediate piece air flow / defrost (item 8 => [ (Item 8) Intermediate Piece Air Guide / Defrost () ] and item 7 => [ (Item 7) Intermediate Piece Air Guide / Defrost () ] ) was crushed or crumpled when the dash panel was being installed, then the air flow to the windshield will be uneven or insufficient.
2 Vents for Indirect Ventilation
• Installed only in vehicles with "Comfort" version A/C system
• Air flows out of these vents on vehicles equipped with the "Comfort" A/C system. The opening in the A/C unit is sealed (different A/C versions) on vehicles equipped with the "Basis" A/C system.
3 Instrument Panel
• With air ducts to defroster vents and various instrument panel vents.
• Different versions, depending on the ("Comfort" and "Basis" A/C systems). Refer to Electronic Parts Catalog (ETKA).
4 Defroster Vent/Right Side Window
5 Instrument Panel Vent, Right
• Removing and installing instrument panel vents, refer to => [ Instrument Panel Vents and Rear Vents ] Instrument Panel Vents and Rear Vents.
6 Air Guide / Dash Panel
• With air ducts to defroster vents and various instrument panel vents.
• Different versions, depending on the ("Comfort" and "Basis" A/C systems). Refer to Electronic Parts Catalog (ETKA).
• The air guide is part of the dash panel item 3 => [ (Item 3) Instrument Panel ] and cannot be replaced individually.
7 Intermediate Piece Air Guide / Defrost ("Basis")
• Different versions, depending on the ("Comfort" and "Basis" A/C systems). Refer to Electronic Parts Catalog (ETKA).
• If the intermediate piece air flow / defrost ( and) was crushed or crumpled when the dash panel was being installed, then the air flow to the windshield will be uneven or insufficient.
8 Intermediate Piece Air Guide / Defrost ("Comfort")
• Different versions, depending on the ("Comfort" and "Basis" A/C systems). Refer to Electronic Parts Catalog (ETKA).
• If the intermediate piece air flow / defrost ( and) was crushed or crumpled when the dash panel was being installed, then the air flow to the windshield will be uneven or insufficient.
9 Air Duct To The Right Instrument Panel Vent
• Removing and installing, refer to => [ A/C Unit Air Intake Housing ] A/C Unit Air Intake Housing.
10 Air Duct To The Right Instrument Panel Vent
11 Fresh Air Intake
• The air is extracted out of the plenum chamber. Refer to => [ Fresh Air Intake ] Fresh Air Intake.
12 A/C Unit With Air Intake Housing
• There are different versions depending on the A/C system installed ("Comfort" and "Basis"). Refer to => [ A/C Unit ] Overhaul and to the Parts Catalog.
• Heating and A/C unit, removing and installing, refer to => [ A/C Unit ] A/C Unit.
• Air intake housing, removing and installing, refer to => [ A/C Unit Air Intake Housing ] A/C Unit Air Intake Housing.
• Air intake and outlet openings, refer to => [ Air Intake and Outlet Openings ] Air Intake and Outlet Openings.
• Air routing in air intake housing and A/C unit, refer to => [ Air Routing in Air Intake Housing and A/C Unit ] Air Routing In Air Intake Housing and A/C Unit.
• Temperature doors in the left and right heater core housing, refer to => [ Heater Core Housing Temperature Doors ] Heater Core Housing Temperature Doors.
13 Removing Air From The Passenger Compartment (In Recirculating Air Mode)
• The air is taken from the passenger footwell under the glove compartment.
14 Right Front Footwell Vent
• Removing and installing, refer to => [ Right Footwell Vent ] Right Footwell Vent.
15 Air Guide To The Rear Vents
• Different versions, depending on the ("Comfort" and "Basis" A/C systems). Refer to Electronic Parts Catalog (ETKA).
• On vehicles equipped with the "Basis" A/C system, there is no air guide and no vents in the rear center console.
• This air guide is attached to the air outlet openings in the air conditioner. There are slits inside the air guide. If the flap position is incorrect, especially on vehicles with the "Comfort" A/C system, whistling noise can come from these slits. The upper slits are covered with tape during production (running change from February 2009). Refer to => [ Rear Vent Air Guide Slots, Sealing ] Rear Vent Air Guide Slots, Sealing.
16 Air Duct To Rear Right Footwell Vent
17 Right Rear Footwell Vent
• The air flows out from under the front passenger seat.
• The right rear footwell vent can be removed without having to remove the carpet; just separate the connecting rib on the carpet. Secure the connecting rib again with a suitable adhesive after installing the footwell vent.
18 Air Guide To Vent In Rear Center Console
• Removing and installing, rear center console.
• Installed only in the "Comfort" A/C system.
19 Air Guide To Vent In Rear Center Console
• Removing and Installing, Rear Center Console, Removing.
• Installed only in the "Comfort" A/C system.
20 Vent In Center Console, Rear
• Removing and installing, refer to => [ Instrument Panel Vents and Rear Vents ] Instrument Panel Vents and Rear Vents.
• Installed only on the "Comfort" A/C system (on the "Basis" A/C system, the opening in the center console is sealed).
• With Rear Temperature Selection Potentiometer (G538) ,
• The Rear Temperature Selection Potentiometer (G538) is part of the vent; cannot be replaced separately. Refer to Electronic Parts Catalog (ETKA).
21 Left Rear Footwell Vent
• The air flows out under the driver's seat.
• The left rear footwell vent can be removed without having to remove the carpet; just separate the connecting rib on the carpet. Secure the connecting rib again with a suitable adhesive after installing the footwell vent.
22 Air Duct To Rear Left Footwell Vent
23 Left Front Footwell Vent
• Removing and installing, refer to => [ Left Footwell Vents ] Left Footwell Vents.
24 Air Duct To The "Center" Instrument Panel Vent
• On vehicle equipped with the "Basis" A/C system, the Center Outlet Temperature Sensor (G191) is installed in this air guide. Refer to => [ Center Vent Temperature Sensor (G191) ] Center Vent Temperature Sensor (G191).
• On vehicles equipped with the "Comfort" A/C system, the Center Outlet Temperature Sensor (G191) opening in the air guide is sealed with a grommet (the Center Outlet Temperature Sensor (G191) is not installed here). Refer to Electronic Parts Catalog (ETKA).
• This air guide has an opening. At certain setting, whistling noises may be present at this opening. Therefore, this opening is sealed with a plug at the factory (running change from February 2009). Refer to => [ Instrument Panel Center Vent Air Duct Plug, Installing ] Instrument Panel Center Vent Air Duct Plug, Installing.
25 Air Duct To The Left Instrument Panel Vent
26 Air Duct To The Left Instrument Panel Vent
27 Instrument Panel Vent, Center
• Removing and installing instrument panel vents, refer to => [ Instrument Panel Vents and Rear Vents ] Instrument Panel Vents and Rear Vents.
28 Instrument Panel Vent, Left
• Removing and installing instrument panel vents, refer to => [ Instrument Panel Vents and Rear Vents ] Instrument Panel Vents and Rear Vents.
29 Defroster Vent/Left Side Window