Hey Mike, Stereo is the original blaupunkt..I had taken the fuse out overnight before to check but same prob, I've had a look at the aerial this morning and all seems to be standard as well, It's a bit of a puzzler only thing I can think of is the odometer but I seriously doubt that would be enough to drain a full battery and plus I had a golf for a few months before this and it stayed on constantly? hmm? No electric windows here unfortunately mate.