Thanks for the input guys.

My first thoughts were along the lines of the sending unit maybe being off.

I've owned the car for over 12 years, and before this I had never noticed the temp over 85C, even with the AC on in Alabama summers...

For $26, I'll have to give it a shot. Is it a difficult DIY project?

Don

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Mine: 1987 MB 420 SEL - 62K (Dec 2019)
Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016
Mine:1981 MB 300SD - 326K mi (July 1997)-sold
Wife's: 2008 MB C300 Sport - 92K mi (April 2009)