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Discussion Starter · #1 · (Edited)
Greetings,
My 1987 300 e has a roar thats progressively getting worse.
It sounds like a hugh fan coming from the rear end and it gets louder with high speed.
Any Ideas?:confused::confused::confused::confused:
 

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1999 C280
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check your wheel bearings. I had a fan or a hum like sound that got louder the faster the wheel turned coming from the rear end and it turned out I had a bad bearing on the drivers side.

good luck!
 
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