temp gauge error, '99 A6

[jlagnese at massed.net]

If its like the older units there is a coolant level
sending unit in the overflow tank. I'd checke that
first.
---- Original message ----

  Date: Fri, 01 Jul 2011 15:23:13 -0400
  From: Lee Levitt <lee at wheelman.com>
  Subject: temp gauge error, '99 A6
  To: Quattro List <quattro at audifans.com>, S-car
  List <s-car-list at audifans.com>
  >A quick question...
  >
  >My mechanic replaced the coolant overflow tank on
  my '99 A6 this week.
  >Not long after, my daughter reported that the car
  was overheating --
  >coolant temp gauge almost in the red and a
  warning on the dash. Oil temp
  >was normal. No other signs of an issue.
  >
  >After sitting overnight, upon starting, the
  engine coolant gauge showed
  >3/4 hot. Shouldn't it read cold on a cold start?
  >
  >Does this sound like a sending unit or wiring
  issue rather than
  >something more ominous?
  >
  >Thoughts appreciated. We're taking a road trip
  tomorrow and I'd prefer
  >to take this car rather than the others...but not
  if there's any
  >question about the cooling system.
  >
  >Much appreciated.
  >
  >The car will go back to my mechanic on Tuesday
  for a formal inquisition.
  >
  >By the way, the car is black, if that makes a
  difference. :)
  >
  >Lee
  >
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