In 2017, I bought a new 2018 Mercedes S63. When I went to pick it up, I asked for the vehicle to be put on the lift to inspect underneath. Within 2 seconds I noticed this big hole in the front bumper, not visible from ground level. If I would not of asked for the lift, they probably would have said, sorry not our fault. Needless to say, I took the vehicle and waited for a new bumper. several months later, I get a call, the bumper is in and painted ready to put on. I deliver the vehicle, get a loaner and that night I get a call that the bumper doesn't fit. Actually, the bumper was missing the internal brackets that hold the sensors. Five bumpers later, same problem, I asked for a new car. Since this was the first year of this model, none available. I wrote an email to Mercedes in Germany and within a week I had a new vehicle. Long story short, the 2018 S63 had a transmission software problem that caused jerking and Mercedes bought the vehicle back. However, I lost $17,000 in the deal. The Mercedes was more than twice the price of the Tesla I now have and I enjoy it more than any of the Mercedes I ever owned. The Mercedes had a few AP features the Tesla doesn't have yet, but all in all a much better Tesla AP and the Tesla would definitely out run the S63. I guess my point is never give up till you are satisfied. Then enjoy the car. Saturday at the Southlake, TX 9-12 the Tesla Club is meeting at the Super Charger area in Southlake Town Sq. for morning get together if interested.