Strange 560sl squeal
I have a 1987 560sl with 93K miles. It makes a soft but distinct squealing noise which sounds like it is coming from under the hood between about 1400 and 1800 rpm, but only in gear and when the car is moving, not revved and braked in gear or revved in neutral. We first thought it was a fan belt but that's not it. The mechanics are stumped, though they have not been able to put it on a dynameter. The noise is more annoying than threatening. Anyone had a similar experience?
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John C
1987 560SL 109,000 miles
2001 E320 103,000 miles
2007 E350 32,000 miles
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