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Strange buzzing noise at 2000rpm
1999 SL500, 133,500miles.
The car makes a strange buzzing/moaning noise between about 1,700 and 2,000rpm. Sounds like it's coming from under the car. It only happens with the transmission in drive, never in park or neutral; generally only discernible at slow speeds (it may occur at higher speeds in higher gears, but I certainly can't hear it). It seems to be getting worse. I have thought it may be an exhaust blow or the transmission. The cats are new. I have checked and it is not the heatshield wrapped around the exhaust. Any ideas most gratefully appreciated.
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JJ Rodger 2013 G350 Bluetec 1999 SL 500 1993 E300 diesel T 1990 190 |
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