r129 1999 rev counter not working correctly

wub

Senior Member
Joined
Apr 1, 2011
Messages
150
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Location
chippenham
Your Mercedes
410d 2.9td 1990
My sl500 r129 1999 rev counter is not working very well, the needle never rises above 1500 rpm and on getting there is "jumpy" and at idle its at 0. Any ideas what up with it?
 


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