Well, after buying my first Golf GTI a month ago, I took it into a VW specialist in Nottingham for a service, and ended up £720 lighter in the pocket! It turned out although the bodywork and engine were fantastic, it had been bodged through its MOT by applying loads of filler to the underside to hide all the corrosion. It also needed a new front engine mounting and rear brake pipes.
Anyway, now it's shipshape, there are a few niggly things that are annoying me and I want some advice on how easy (or not) it is to fix them.
1) The rear windscreen heater doesn't work. The light comes on the dash when you flick the switch, but nothing happens. Is this a simple connection issue, or would it be a complete pain in the arse?
2) The bulb behind my rev counter/fuel gauge doesn't work. The other bulb behind the speedo gives just enough illumination to make them viewable in the dark, but it's not ideal. Is it easy to take the dash out to get to the bulbs?
3) the interior part of the driver's door is coming away from the bodywork. I could glue it back on, but what's the best plan?
4) From cold, when idling the revs go from slightly above 1000rpm to slightly below. It's hardly noticeable, but does it need a good tuning?
5) Every now and again the temperature gauge drops to cold, even when the car has been running for a while - again is this just a connection issue?
6) RUST - there's some slight corrosion near the 'Golf GTI 16v' badges on the rear, and also I can tell there's some bubbling just underneath the rear windscreen where the wiper sits. How costly would this be to get repaired?
7) Swirling! The last owner was good enough to keep it waxed, as the rain just beads and drops off nicely, but it's a bit swirly. What's the best way of buffing this out? Any products to recommend?
That should do it for now. I'm sure I'll have some more questions again soon!

*Edit* I forgot number

The MFA trip computer thing doesn't seem to work at all. Can it be salvaged?