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Strange sound from engine/gearbox

steve333

MB Enthusiast
Joined
Oct 22, 2009
Messages
4,201
Location
Dorset
Car
Cls350cdi in palladium,C200k in tenorite,Slk320 in red.
Have been monitoring an annoying sound that comes from the engine/gearbox for the past 6 months or so,when the revs hit about 2,300(both up & down the auto box) there's a sort of humming/vibrating sound that isn't present anywhere before or after 2,300rpm(makes no difference if the engine is cold or at normal temperature).The auto box atf/filter etc was changed about 6,000 miles ago & the sound wasn't present when i bought the car last october.(2002 w208 clk320 cab,81,000 documented miles)the car is booked in for a b service & mot with mb Guildford on wednesday,so any pointers before i decide whether or not to mention it & adding to the £££:crazy:
 

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