Car runs too cool/intermittant autocheck annoyances

[Aaron Rosenstein]

After a 5 year break from Audis, I got the bug again and picked up a
nice 91 200tq from a local seller. The car is in amazing shape overall,
and has less miles than my last one, but still ahas a couple quirks.
 
I'm concerned that the engine seems to runn so cool. Unless I'm driving
around town slowly, the temp needle never get off the bottom three
lines, and my last car always ran just under half even on teh freeway.
 
At the same time, I get the annoying intermittant overheat/water symbol
on the autocheck box, and alternatively an oil and brack pad warning at
odd times. I don't know if either of the three are related, but they are
all false signals as the gauges (presumably) don't lie, and I have good
oil pressure and am not overheating.  Has anyone ever found a way to
unplug the autcheck systems without losing the radio display ability?
 
Thanks,
 
Aaron Rosenstein
91 200TQ
Anacortes, WA