A3 Mk2
| Air routing in air duct |
| 1 - | Air duct assembly |
| 2 - | Fresh air/air recirculation flap |
| q | Opening for air intake from plenum chamber (fresh air) |
| 3 - | Opening for air intake in air recirculation mode |
| 4 - | Fresh air blower -V2- |
| 5 - | Dust and pollen filter |
| q | Heed replacement intervals → Maintenance tables |
| q | Different versions of the dust and pollen filter are available as replacement part (with and without activated charcoal element) → Electronic parts catalogue |
| 6 - | Noise insulation |
| q | Vehicles with no air conditioner (heater only) are fitted with a foam core (for noise insulation) instead of the evaporator. |
| 7 - | Bottom part of air duct (with fitted components) |
| 8 - | Fresh air blower series resistor with overheating fuse -N24- |
| q | Removing and installing → Chapter |
| 9 - | Air outlet to air distribution housing |
| 10 - | Air distribution housing |
Note| Heater air distribution housings with a flap in the air outlet to the dash panel defroster vents with no side recess were gradually introduced as of November 2007. On vehicles with no air conditioner (heater only) or with manually controlled air conditioner (not automatically controlled), this modification to the flap has no influence on regulation of the heater and manually controlled air conditioner (the flap is only actuated by way of the setting on the controls of the heater or manual air conditioner) → Chapter. |