It is not connected, but if your OVP rattles I would replace it.

Sounds like the cluster is toast. If the tach is broken, no cruise, no A/C....

Double check the main plug that goes into the cluster on the left side (oil pressure side) hasn't broken or was put back on incorrectly. If it is not plugged in right, weird things will happen.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
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2003 Gray Mercedes ML350 - 122k