After writing my brilliant and well thought out post, I noticed that he said the mark above 80 degrees.

Since the marks on the gauge are at 20 degree increments, this means that his car is running at or above 100 degrees.

Ignore my comments about running cold at 80 degrees, but everything else applies. :p

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".