Hello. New to the site and got a puzzling problem on my uncles Astra. The passenger window lowers by itself when the car is locked. It doesn't happen when driving just when he parks it up he comes back to it and the window is open about three inches. Its been back to the dealers five times, all they have done is replace the switch on the opposite side which has had no effect, and say that they can't find any other problem. It's an 02 plate 1.6 with only electric front windows. Anyone any ideas as he has to remove the fuse when he parks it at the moment?