The ecu for the comfort system is under the passenger floor carpet, unclip the sill cover and lift the carpet. Usual problem is water ingress from pollen filter housing under bonnet. hope this helps you.cheers D.F.
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Audi A4 1.9 TDI AWX 2002 - Rear door locks not working - Fixed # - David Doyle October 21, 2010, 6:40 pm
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