2015 Mercedes C300 rollercoaster diagnostic, timing or camshaft? 

Mario Rojas (aka Super Mario Diagnostics) has been repairing cars since 2013 and sharing his repairs on YouTube for the last five years. Fitting to his username, he primarily focuses on diagnostics and troubleshooting – and he’s garnered quite a following doing so. He currently has over 56 thousand subscribers on YouTube and over five million total video views.

In this post, Mario relies on ALLDATA information and discovers a minute detail that assist him with a confounding diagnostic. See the whole video for all the details.