 A few months after purchasing my vehicle the air bag light came on. The problem was fixed but another problem came up. The coolant level indicator appeared. Recently, the car has been brought in for steering bearing problems and the transmission jerks. The steering bearing, computer module, and transmission valve has been replaced. But the car still jerks. I have brought the car in for this problem 4 times. Now they are telling me that the jerking is normal. I've never driven a car that jerks so I don't think it's normal. I'm so disappointed that I bought a Mercedes and it turned out to be a piece of crap. I thought Mercedes makes good quality cars that's why it's so expensive. 