Mercedes Benz unable to fix a Merceds Benz

In March 2015 my vehicle E320 CDi was taken to the dealership for a problem with Jerking on acceleration. The injectors were replaced (at my cost) and a few days later the problem recurred. I took it in again and was told nothing was wrong. This continued till I eventually got stuck on the highway (same problem occurred) and the vehicle cutout completely while I was overtaking a truck. I was then told that it was the Fuel Rail system and had that replaced (again at my cost). I got the vehicle back and to my astonishment the vehicle still had the same problem. <br> <br> The vehicle was again taken into the dealership and now i am told that it is the turbo actuator. I am again expected to change another component which I am not sure will resolve my issue.<br> <br> I logged a call with Mercedes Benz South Africa Complaints department and was told that I will have feedback within 48 Hours as this is MBSA's response time. I did not receive any feedback or communication from the MBSA agents after 72 hours and had to call in my self to follow up on the process. I was told that they will follow up with the dealer in order to find out what was going on. This was after their 48 hour response window.