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| Ultrasonic air conditioner cleaning unit -VAS 6189- |
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| Cleaning fluid -VAS 6189/1- |
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| By switching from fresh air to recirculated-air mode, check whether the air conditioner unit evaporator is really the source of the odour. |
Note | The odour can only be eliminated by cleaning with the ultrasonic air conditioner cleaning unit -VAS 6189- if it actually occurs in the evaporator. |
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| Check the plenum chamber and the water drain valves fitted in it and clean these if necessary. |
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| Check for odour from and contamination of dust and pollen filter → Chapter. |
Note | On this vehicle, the dust and pollen filter is installed at the intake housing of the air conditioner unit upstream of the fresh air blower -V2- and does not therefore have to be removed for cleaning. |
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| On the operating and display unit, Climatronic control unit -J255-, set “recirculated-air mode” and switch off the compressor “Econ mode”. |
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| Open the dash panel vents and, on the operating and display unit, Climatronic control unit -J255-, set the lowest possible temperature for the driver's and front passenger's side (e.g. “Lo” temperature setting). |
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| Close the vehicle windows and sun roof. |
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| Select the lowest fresh air blower speed on the operating and display unit, Climatronic control unit -J255- and set the air outflow direction to the “dash panel vents”. |
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| Shake the bottle of cleaning fluid -VAS 6189/1- and pour the fluid into the ultrasonic air conditioner cleaning unit -VAS 6189-. In doing so, heed the operating instructions for the ultrasonic air conditioner cleaning unit -VAS 6189-. |
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| Position the ultrasonic air conditioner cleaning unit -VAS 6189- in the passenger's footwell. |
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| Start up the ultrasonic air conditioner cleaning unit -VAS 6189- (in accordance with the appropriate operating instructions) and position the outlet hose such that the vapour emerging is drawn in by the fresh air blower -V2- via the recirculated-air opening of the air conditioner unit (in the passenger's footwell behind the glove box). |
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| Close the vehicle doors. |
Note | The cleaning process takes roughly 15 to 20 minutes and is completed when no further vapour emerges from the outlet hose. |
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| Switch off the ultrasonic air conditioner cleaning unit -VAS 6189-. |
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| Open the vehicle doors and vent the vehicle for at least 10 minutes. |
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| Remove the ultrasonic air conditioner cleaning unit -VAS 6189- from the vehicle and clean it in line with the appropriate operating instructions. |
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