Hello people. I've recently purchased a 1995(N) A4 1.8T. Done about 60k with fsh. It had been standing dormant for a while before i bought it but it made the 70 miles home with no problem. This was about 7-10 days ago. Since then i've only started it a few times and this morning i went to start it and the battery was dead, nothing to it at all so i jump started it, ran it round the block and on idle for 10mins or so and now it seems fine although the revs jump between 500 and 1000 rpm after i've revved the engine and it returns to idle. The battery is charging at a sufficent voltage as i've had a meter on it so i'm wondering if it was purely cos it has been sitting idle. Also i have noticed that the boot central locking motor seems very whiney and wondered if this could be faulty and causing a drain on the battery. Any advice greatly appreciates. Apologies for going on, wanted to get as many facts as possible down.