"Graham Humphreys" wrote
> I have a 1998 A6 2.8 Quattro Avant ( uk car) with 150,000 miles in
very good
> condition & full history. Lately the fuel gauge has been playing up,

This is actually quite common on many Audis. Most of the time, the fuel
sending unit needs replacing. See if this link can help you:

http://www.robsaudiworld.com/fuelrepair.htm


Second possibility is faulty gauge, but I'd start with the FSU first.

Good luck,

Pete