there are ground straps between all three instruments and it would seem one is not making contact.i have run a ground wire from metal screw going to main ground terminal behind instrument panel and cured this problem.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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