Mercedes C-Class Exterior Pillar Posts Trim Set "car reading key" Questions

...key a quick turn the car start and runs great and everything inside functions normally, the check engine light is on throwing the code " serial communication link " sounds like a dodgey ignition ...

...car made it home...whew ran a couple lights, and died in the driveway. Any ideas, anyone??? Thanks for your question! This could be a multitude of things but I will try to cover the basics first. The ...

...car wasn't started & used EVERY DAY, it seemed to increasingly need a trickle charging to stay charged & often, even that wasn't enough & it'd need a jump ... then a lengthier boost each ...