Hey guys, I've began to develop a new problem with my C220. When I start the car up, simply a turn of the key, the car starts up, then it feels like someone(like a ghost) is accelerating my car and I'll see the tach go flying past 2500 RPM, and hold for a second or two and then drop down to normal...Does anyone know what's going on? THanks

p.s. I still can't solve my coolant leak/missing situation