Jon, I would love to hear if you got any response to this. My wife took our mk3 59 plate out today and told me all of the windows came down to varying degrees by the time she got back to the car - all by themselves after the car was locked. Its baking hot here and no rain for days. Been searching everywhere and there are responses about wet circuits etc, but that can't be the case here. Hope it was an isolated case for you and all now resolved. Any advice from other forum people gratefully received. Thanks, Tony