Re: What's the reliability like?
Your missing pixels problem is common across all the VW/audis of that sort of age. I've got a 15yo A4 that has the same problem. It's a different sort of display anyway - dot matrix rahter than lcd. Dry solder joints or knackered flexi strip will be the problem I think. Like all these things, it'll cost you a fortune get it fixed by the stealership, but if you know someone with a few simple tools and a couple of hours to spare they can be fixed relatively cheaply.
BTW - I know VW/Audis have their problems but, how may Fords/Vauxhalls/etc do you see on the road that are more than 10/15 years old compared with the number of VW group ones? Mine's done a quarter of a million miles and still goes like a train. YMMV of course :-)