I changed the P1 and P2 codes as you recommended and still no difference. any other leads? I read somewhere maybe an engine speed sensor or is it car speed sensor? I am trying to figure out all the relevant sensors that are connected to the instrument cluster and they relayed to the N22. It seems any sensors connected straight to the N22 would trigger a fault and I am not getting any fault codes.

Your help is greatly appreciated. Would this be the kind of problem a good indy can figure out or should I go to the dealer?

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)