PeachParts Mercedes-Benz Forum - View Single Post

F18 · #2 11-18-2009, 01:34 PM

Quote:

Originally Posted by GregMN

1991 350SDL

A week ago the outside temp display seemed to be accurate. Now the displayed temp is about 20 to 30 degrees F too high. The sensor is mounted behind the license plate and has not moved itself to a warmer location for the winter.

Has anyone else experienced an inaccurate temp reading and figured out what the problem was?

Thanks,
Greg

Greg.... that is an odd one! I have seen the temp displays sometimes reset to Centigrade which would show lower digits than the normal Farenheit temp scale. Usually that occurs when someone hits and holds the wrong botton or a battery is disconnected for a while.
Most of those temp sensors just quit working when defective.
Are you looking at it after the engine is parked and idelling for a while?....which would be influenced by rising engine temps. Does it settle back to normal while driving?