I've got a 1991 Mercedes 420SEL -- most of the time the electric cooling fans roar to life upon engine startup (cold), then turn off about 5 minutes later (after engine warms up). Other than that, they DO operate normally at elevated engine temp's (when idling hot day and a/c/ turned on -- water temp gauge is up there..).

What's going on here?

I'd appreciate any input...

Bob Irving
Charlotte, NC