We own a Mercedes Benz C220, year 1994. There is a problem with the car bucking and jerking. It seems to happen anytime the foot is on the gas pedal. Lower speeds are worse, if you can get cruising at highway speed it seems to be okay but you have to be accelerating. Could this be an oxygen sensor? Our mechanic mentioned that it may be the throttle body, but he could not get it hooked up to a diagnostic machine. Car currently has about 245,000 miles on it.