| Cleaning evaporator with ultrasonic A/C cleaner -VAS 6189- |
| Special tools and workshop equipment required |
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| Ultrasonic A/C cleaner -VAS 6189- |
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| Cleaning fluid -VAS 6189/1- |
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| By switching from fresh air to air recirculation mode, check whether the air conditioning unit evaporator is really the source of the odour. |
Note | The odour can only be eliminated by cleaning with the ultrasonic A/C cleaner -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 → Chapter. |
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| Remove the dust and pollen filter and check this for odour and contamination → Chapter. |
Note | On this vehicle, the dust and pollen filter is installed between the fresh air blower -V2- and the evaporator and must therefore be removed for cleaning. |
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| Remove leaves, dust and other contamination from the installation slot for the dust and pollen filter of the air conditioning unit → Chapter. |
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| Re-seal the opening at the air conditioning unit through which the dust and pollen filter was removed. |
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| Open the dash panel vents. |
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| Close the vehicle windows and sun roof. |
| Settings for vehicles with automatically controlled air conditioner (at operating and display unit, Climatronic control unit -J255-) |
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| Set „air recirculation mode“ on the operating and display unit of the air conditioner and switch off the air conditioner compressor („Econ“ mode). |
Note | Depending on the version of the operating and display unit, „Econ“ mode can be recognised for example from the indicator lamp in the button lighting on the model with ECON button and the indicator lamp in the button not lighting on the model with AC button. |
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| Set the lowest possible temperature for the driver and passenger side (e.g. „Lo“ temperature setting). |
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| Set the lowest fresh air blower speed and select „dash panel vents“ for the air outflow direction. |
| Settings for vehicles with manually controlled air conditioner (at air conditioner controls, air conditioning system control unit -J301-) |
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| Set the lowest possible temperature (rotary temperature control on „cold“ stop) and select „air recirculation mode“. |
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| Switch off the air conditioner compressor by way of the AC button (the indicator lamp in the AC button does not light). |
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| Set the air outflow direction to „dash panel vents“ by way of the rotary air distribution control. |
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| Set speed „1“ at the fresh air blower rotary control. |
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| Shake the bottle of cleaning fluid -VAS 6189/1- and pour the fluid into the ultrasonic A/C cleaner -VAS 6189-. In doing so, heed the operating instructions for the ultrasonic A/C cleaner -VAS 6189-. |
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| Position the ultrasonic A/C cleaner -VAS 6189- in the passenger's footwell. |
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| Start up the ultrasonic A/C cleaner -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 air recirculation opening of the air conditioning unit (in the passenger's footwell behind the glove compartment). |
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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 of the ultrasonic A/C cleaner -VAS 6189-. |
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| Switch off the ultrasonic A/C cleaner -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 A/C cleaner -VAS 6189- from the vehicle and clean it in line with the appropriate operating instructions. |
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