I reported multiple times to Mercedes USA that the vehicle was experiencing electrical issues as I was periodically loosing power and/or control over the vehicle. The vehicle was returned twice to the dealership but the problem always came back pretty much immediately. On the day of the accident, I was driving the vehicle on a straight road. The road was a little bit humid as it has been raining few minutes/hours before but it wasn't raining at the time I was driving. I was maintaining a speed of 55mph (speed limit on this portion of the road). The vehicle started to suddenly move by itself on the right side. A minute later, the vehicle moved a second time on the right without any apparent reason. The third time, the vehicle suddenly accelerated and made a sharp turn to the right. The turn to the right was so sharp that the vehicle made a 180 degrees turn and was projected on the side of the road. The vehicle stopped in a ditch and engine stopped. I wasn't braking or turning the wheel when the vehicle started to act-up. I didn't feel any movement in the steering wheel and I couldn't control the brake or direction. I restarted the engine and the brakes and directions were back up again. I contacted Mercedes who wants to inspect the vehicle but didn't set a date yet. Sheriff arrived on the spot less than a minute after the crash (was driving back home after his shift). He confirmed no collision with another vehicle, no marks of tires on the road, no standing water on the road o