Hello y'all. I'm new to this board, and I must say I am impressed at the quality information being shared here.

Now, my 95 C280 has been running hot lately, with temperature rising above 110C on city driving and the aux fan not coming on. Usual temp range has been 80 - 90C under fairly mild Nor Cal conditions. Mechanic feels that my fan clutch is not engaging properly, and I am curious as to what is the function of a fan clutch. Also, is this an expensive job?

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Edward Cho
Menlo Park, CA
1983 Porsche 944
1995 C280