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Old 03-17-2003, 10:37 PM
Ralph Burnette Ralph Burnette is offline
Registered User
Join Date: May 1999
Location: Somers, CT
Posts: 73
Temp Guage goes up then drops

I have a 1993 300sd (w140) that has started exhibiting the

I drive at 70mph or so for about an hour. The temp guage
starts to rise from the normal 80-85C to 100 and sometimes
110 degrees C. After a little while, the needle jumps up a
little then drops (literally) back down to normal (80-85 degrees).

I haven't seemed to have lost any coolant. The two fans in
front don't seem to come on.

This has been irratic behavior of the temp guage. I cannot
replicate it at will (ie, drive up a hill, etc.).

Also, I haven't had any issues a lower (non-highway)
Ralph Burnette
1993 300SD (286k + miles)
2000 SL500
2001 ML320
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