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  #1  
Old 03-02-2004, 06:12 PM
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Question Buzzing sound when in gear

1994 c280 75k miles.

Sometimes when I put my car in gear it will make a humming noise. It won't do this when in N or P, but will in all other gears. It's almost like a humming/buzzing sound. It goes away in a couple of minutes once the car is warmed up. It has me concerned though because I know it's not going to go away on it's own. Last transmission/converter change was 10k ago.

Does anybody have any ideas what this may be?

Thanks
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Old 03-02-2004, 08:03 PM
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Engine mounts????
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Old 03-03-2004, 01:36 AM
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If it was the mounts, why would the noise go away after a little bit? Thanks.
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Old 03-03-2004, 05:08 AM
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mine does the same- i was advised to try turning the steering to the stops with it in gear - does the buzzing get worse? if it does - definately the engine mounts (the steering on full lock gives a bit more work for the engine). or try it in neutral / park - does the buzzing start?

i think it is because the oil in the gearbox is cold, and therefore take a bit more work to turn.
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Old 03-05-2004, 03:09 AM
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I'll try turning it tomorrow and see what happens. The noise goes away in Neutral and Park.
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Old 03-05-2004, 02:28 PM
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Could be the shifter bushings wearing out if they are same/similar to my 300D. At certain rpms mine would buzz/vibrate. Maybe different gear positions load them up so they are quiet/noisy. Don't know why it would change when hot, though.
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