Potential owner looking for common problems
I'm currently looking at a 2011, and have been doing research to find common issues with the vehicles before I commit to anything.
Currently I am aware of the head bolt issue that plagued most of the M156's, including some of the MY2011s. Valvestud has checked the VIN of this particular W212 and it is post-60658. I'm going to have the dealer take a photo of the engine serial number just in case.
Did the upgraded lifters make it into the post-60658 engines as well? As I understand it, MB now only sells the revised lifters with oil drain designs similar to the SLS M159 engine. However, there's a lot of confusion on whether they were also changed over on production vehicles when AMG changed the head bolts over on 60658.
Also, cam adjusters. I see that the W204 C63s are having the "cam adjuster rattle on hot startup" issue much more frequently than other M156 cars, and as I understand it they also had a different design for their cam adjusters. How prevalent is this failure on W212s?
Finally, is there anything else I should be looking at? Any common problems at all would be incredibly beneficial to me.
Thanks for your time!
Good luck. you'll love it. i've had mine since january and have replaced the voltage regulator, battery, serpentine belt, and tires.



