2014 W212 E350
Good day. I am not getting any codes on my 14’ W212 with 116k. Production was 5/13 and engine number is after the check valves and tensioner fixes. I get the rattle and sometimes the engine shakes and it feels like it’s about to stall. I get that once I start the car again after a drive to work. I been trying to get it on video but everytime I’m recording it never happens lol. I suppose with no codes, this is where I should start? Make a marking like with the white marker and turn by hand about 10 times to and listen/inspect any deviation or jump? Thanks for any tipsIf you're getting the noise but not the code, then you have a bad camshaft adjuster.
Really easy way to test is to take off the timing cover so the camshaft adjusters are exposed, then draw a mark on the adjuster valve and adjuster, then spin the engine by hand a few times.
Eventually the side with bad adjuster will jump right before your eye.
Here's an example, observe the white marks on the valve and adjusters:
View attachment 2793212
These sets are good. I spun the engine 8 to 12 times. No noise, the adjuster solenoid valve kept track with the adjuster.
View attachment 2793213
Can you spot it? This was only after 3 revolutions. At more revolutions, the marks would keep jumping forward, and you'd actually see it with your eyes.