Maybe you need to take it to them. I find it difficult understanding what you are describing...they do too probably.
long qeueing! its not recession at all at the dealer!!
I unplugged the cable next to the MAF (I think big cable connect to the ECU) and guess what! found oil!! this oil i think was when i was spraying all over the place trying to find a leak!!! lol
however, dryed whatever i could with a tissue (waiting to buy a crc spray) and plugged it back, turn on car, drive it.. amazing.. perfect.. new car.. stop, turn off car, get back in 10 mins and turn it on, still warm, car shakes like its dying.. rpm goes to 450 then up to 700! drive it, drive perfect, stop the car, put on P, here we go again, 1200 rpm!! turn it off, go back to benzworld.org in vain trying to get a hint!