Just got myself a 1999 audi 80 cabriolet 2.8 final edition, but have a few electrical niggles to cure, if anybody has had these problems and can advise on how to repair or where to look:

1. Water temperature gauge not functioning
2. Oil temperature gauge not functioning
3. instrumentation LCD for trip computer has pixels permanently on, on bottom 5 rows
4. Alternative radio electric aerial as Audi have stopped manufacture or is there a repair kit?

The vehicle is mechanically sound and it's only these electrical issues that are remainig.
thanks for your input in advance