 I bought this SUV on May 21 and had to 
take it in 3x's for the same problem- 
accelerator hesitation. When I would 
mash on the accelerator, it would 
hesitate for a few seconds and then 
take off. They replaced parts on all 
ocassions and the problem still 
existed.  I took it back this past 
weekend and the dealership paid me what 
I had bought the SUV for and I traded 
it in and bought a Yukon.  I just 
assumed that since this was a Mercedes, 
that it wouldn't be a piece of junk and 
that it was of high quality, but the 
joke was on me.  I could see that I was 
headed for a life of misery with this 
SUV and am grateful that I was able to 
get out of it.