3 weeks now that i am having lack of power, and mercedes do not find the cause, I am renting a car now, lack of pressure at the turbo, anybody familiar with this, I see that it is going to be a nightmare, I need to start the engine 5 times to get the original power each morning. I went to 2 different mercedes services now and they are not finding the cause, one said the turbo may be good to change and the other is trying to measure the turbo pressure tomorrow to see where the lack is coming from...i think we re going to be there in 3 weeks. Anybody familiar with this problem.