I agree that they don't have the expertise at the dealer or else they would not have had to call them each time for assistance! Nor would they have struggled with the car for this long... Even though my dealer claims to have one "certified" mechanic for my type of vehicle. I'm going to see what happens on Monday (what else can I do?) and if anything is still wrong, then I am going to request (maybe demand at this point?) that it be taken to a Mercedes dealer since its their engine. I just have to wait and see... Until then, I get to cruise around in a PT Cruiser... and let me tell you, living in FL without your convertible sucks when the weather is awesome!!