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Old 05-28-2002, 03:00 PM
per eriksson per eriksson is offline
Swedish Diesler
 
Join Date: Jan 2002
Location: Sweden
Posts: 106
It is electric and common cause seems to be that the tach looses it's grounding.
Solved by rerouting a ground wire on the back of the instrument cluster.

Does your AC work ok? If it does the sending unit on the engine is ok. If it also has failed the sender or it's cabling might be faulty.
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MB E300TDT -98
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