It appears your initial post wasn’t read very carefully.
I also have an 81 240d that runs hot in the summer.
And I too have done all of the things you have done.
On a 95° day, what’s your running temperature without the AC?
Is there a different result highway or city?
The appearance of a radiator has very little bearing on whether it’s internally clogged or not.
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1981 240D 4sp manual. Ivory White.
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