I am losing my mind over this. I bought a 2013 c63 in May and the last few months it has been making this clunking noise. I have taken it to the dealership 3 times so far and each time the noise goes away for about a week only to return worse than it was. It used to only make noises when I turned right on incline changes at low speeds. Now it makes the noise going over any bump at any speed.
The first time I took it in they replaced the front left strut. The second time they replaced the front right strut. The third time they replaced the lower control arm.
I am posting 2 videos of the noise. This video is between the first and second visits and the noise can be heard around the 24 second mark.
This second video was taken today, 2 weeks after my third visit. You can hear the noise continuously throughout the video on any slight bump.
Any and all advice as to what this is would be greatly appreciated.