BenzWorld Junior Member
Date registered: Aug 2009
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Cooling fans 1988 300SEC
I have just bought a 1988 Mercedes 300SEC. None of the fans worked.
I replaced the blue temp sensor on the head and now the auxcillary fan does work when engine reaches a high temp. When I switch the aircon on then the auxcillary fan does not come on but the aircon is functional and cools.
Also it seems that the mechanical fan does not lock up. How and what should I test/replace. I noted that there is also a green temp sensor with two wires in close proximaty to the blue sensor, what is that sensor for ?