[s-cars] Temp and Fuel Gauge not functioning after battery charge

[Taka Mizutani]

Randy-
I think if you didn't use a proper battery tender/maintainer and left it too
long, you might have killed the battery as well as some electrical stuff in
your car.

First thing- disconnect the negative lead from the battery, let the car sit
for a while. Then check the state of the battery with it disconnected from
the car. Then try hooking it back up, see what happens. If you don't have
any change, you might have caused damage to your car. If you have the
Bentley manuals and VAG-COM, you should be able to address all of the
control modules in the car to see if you have any fault codes stored. That
would be a start.

Taka