Greetings Mr. Kilmer and Techsus,
I hope all is well. I have a 2009 Mercedes C300 that vibrates somewhat roughly at idol (and sometimes briefly vigorously). When it's cold the transmission jerks and the RPM jumps slightly when changing from 1st to 2nd gear (but this stops after the car warms up), and when the engine is warm every now and then it I will hear a clunk and feel a jerk when its down shifting. I saw your video where you spoke about the torque converter, could this be an issue?
Thanks, Pendelton King