I inherited a 500SEL which I drove for the first time today and there's this constant whining noise coming from somewhere in the trunk. Is this the fuel pump? Vacuum pump?

I tried a search but I haven't been able to find any other threads on this. Someone please tell me this isn't normal, it's driving me .

Other than that this car seems very nice. Just gotta get me some Euro lights!

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'81 300TD Wagon 355k (Miss Diesel)
'83 300SD 180k
'84 500SEL 190k (Parting it out)

It may well be a fuel pump on the way out, have a listen to the right rear (from the back of the car - LHD passenger side) when the car is started, but stationary, you should be able to hear the pump whirr but not whine.

Cheers

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1988 W126 420 SE

beware of fundamentalists!

It could be a loud fuel pump, but that doesn't necessarily mean its soon to fail. It may whine like that for years before failing.

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- Brian


1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600