C250 started to not shift itself into proper gear on way to Atlanta. Car would vibrate badly and I had to quickly figure out that I had to then shift the car manually. Car would sputter and vibrate and would only go somewhat forward with least vibrations in D5 gear. Right before this I was reminded that my Service B was due in 500 miles. Barely made it home and prayed all the way. This car has been serviced regularly of its life and used primarily on the highway taking me to my acting and modeling jobs. Seems like a transmission and drive train issue. Already at 60,000 miles had to fix two transmission seal leaks. Car has been expensive to keep up maintenance wise. 100% MB dealer serviced. Service A & B always $700+ each visit. Visit #13 next week 8/15/24. Anyone else having this shaking and shifting issue?? THX