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Is there a relay switch for the instrument panel?

(1990 Mercedes-Benz 300SEL)
in El Paso, TX on November 28, 2017
instrument panel acting erratically. The lights all work but sometimes the gauges stop working (fuel, water, battery, oil, odometer and speedometer), then will come back on.
What seems to make the problem better or worse? after i stop driving for awhile
How long have you had this problem? 2 days
Tags: instrument panel gauges, mercedes benz, 300sel
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on November 28, 2017
After you have verified that the wiring at the back of the gauge cluster is intact and not loose you may have an issue with a solder joint in the cluster's circuit board. This was common with old Mercedes. If you hit the cluster does it start to work?

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on November 28, 2017
this just started occurring on a road trip while driving from CA to TX so i haven't opened it up. I first checked fuses and relay switches while stopped for gas and got it to work again. It worked briefly but again stopped after stopping for gas. Thanks for the tip I'll check it out in the morning.
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