Well, you have a good point. I should leave well enough alone. However, after working on large mainframe computers for many years and cars for many years (yes, I am old) I learned that if there is a known problem (fan engaged when it shouldn't be), it needs to be fixed before it causes other problems. Remember this is a old car that likes gas and doesn't need the added stress of a big fan in the front of the car adding an additional load on the engine when it is not needed.
This is our traveling car. We are willing to put the gas in it to have a comfortable quiet car to ride in. So with the fan staying engaged when not needed, we use more gas in a noisy car.
We are wanting to go on another road trip out west, maybe in September, if we can get some things worked out. Last trip out we drove a little over 7000 miles but had to cut our trip short. We had planed on about 10,000 miles.
Why do we drive? So we can do and see what we want to do and see, not what some tour company wants us to do and see.
So I am not working on a "well enough" problem.
What bothers me most is the thermostat (BEHR) and the fan clutch (BEHR) are both made in China now. I can't seem to find anything make in this country or Germany.
The Pull-a-Parts don't have anything anymore (generation 1 126 cars) in my part of the country.
I checked with the local dealer and the fan clutch has to be ordered, $665.00, and they couldn't, or didn't want to tell me where it was made or the manufacturer. BEHR is an OE company, but have started using China.

Does this explain why "well enough" is not "good enough".

PaulM

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84 500 SEL (307,xxx miles)