Replaced the pressure cap. Inspection of the old one showed that the rubber was in bad shape. I suppose that was the problem. Should be able to tell soon.

Still don't understand in what circumstances the auxiliary fans should come on. Reading other notes suggests that one is for something involving the a/c. What about the other?

Momo

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1990 500SL 65k km - until May 11 2004
2004 E320 4-Matic wagon
2004 CLK500 Cabrio from May 11 2004