Is the only problem the rising heat? This is probably for the AC, the auxiliary fans are not starting, probably because the water temperature sensor is faulty. Part# could be this one A0065451524

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600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.