Question1991 500SL 129.066 / 119.960
The speedometer and fule consumption gage work when the car is cold in the morning but become eratic and quit completely when the car comes up to temp they also quit some times when driving on a rough road. I suspect loose wires but have no idea the locations to look.
AnswerAnswer:
It could be the cluster or wiring.
Please read these two threads.
Who Rebuilds or Tests Instrument Clusters?
http://www.mercedesshop.com/shopforum/showthread.php?p=510680
MB Wiring Harness Failure
http://www.mercedesshop.com/shopforum/showthread.php?p=927185
