check your cooling fans...they might be ...the electrical connection might be connected backwards...it happened to me on my 91 300TE and it now runs perfect.

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I have never met a man so ignorant that I couldn't learn something from him. -Galileo Galilei, physicist and astronomer (1564-1642)

I had already checked the cooling fan direction from your previous post in this thread. They are fine and run in the correct direction.

Hi, I've been searching for info about the engine temperatures on my 89 2600 W124. They seem too high.
This thread is lots of help.

Where exactly is the electrical connection you're talking about, so I can check if it's plugged in backwards?
I can't find anywhere the auxiliary fans plug in near the fans themselves.
The only place I can find where anything plugs in and works the auxiliary fans, is the 'blue' temp sensor at the rear top of the cylinder head.
Thanks for the great forum.
I checked in the link to the CD's, it seems they run very hot.
I would still prefer if the engine ran at less than 105C.
http://www.startekinfo.com/StarTek/outside/12264/Program/Engine/103/20-0020.pdf

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1989 W124 260E