There will be a main overload protection relay, which will contol the feed to these items. I had an E class with similar fault. On the cars there is a relay called a K40 relay which supplies voltage. Although I would pull out the fault codes if any out of the ECU. Before changing components.
Thanks for all replies.
i think andy's closest as further investigation has reveled
a, switches on dash have lost all supply to Red/Blue ( +12 sw).
b, Circuit board at instruments seems very suspect.
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