2012 Mercedes Benz C63 AMG (W204) – Random Misfire and One Bad Cat?

We are diagnosing a light idle misfire and check engine light on a tuned 2012 Mercedes Benz C63 AMG.

2012 MERCEDES BENZ C63 AMG (W204) – We are taking another look at the 2013 Mercedes Benz C63, with continued issues.

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