226,000 o my ML430. My instrument cluster just started doing this on Saturday.

I took out and disconnected it hoping that something would reset when I reconnected it but nothing. I did notice that the tach needle vibrates wildly once I turn the key to on and continues this until all the needles begin to work.

Any clues as to what may be going on?

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1999 ML430
2003 Chevy Suburban Z71
1993 Honda Prelude V-Tech