Temperature Gauge on 1990 100

[Theodore.Haug at rrd.com]

Hello to all!

I have long been a lister on the V8 list, but with my recent acquisition of
a 1990 Audi 100, I have started receiving the posts from the main list.  I
have bee lurking for awhile now, but have a question I would hope someone
might have the input I need.

The 100's instrument cluster works well, with the exception of the water
temp guage and the auto check/clock set button.  I can live without the
clock and the autocheck feature.  But I was hoping someone might be able to
point me in the right direction for repairing the temp guage?  Wondering if
it usually the sensor that fails or the guage itself?  I would guess the
sensor, but I don't even know where to look for it?  Any insight would be
appreciated.

Thanks in advance,

Ted Haug
90 V8 quattro
87 Coupe GT
90 100 automatic