Ok heres the story. I have a 97 c230 and for some reason every now and then ( whenever it feels like it) it will go into a hard vibration in the engine and loose exceleration. I jam down on the accelerator and it sputters its way up to speed( takes about 10 seconds just to excell to 30) I have been told it could be the mass air flow sensor or the transmission fluid needs changed. I am thinking its in the air flow sensor or o2 sensor. Any idea what it could be? Its diving me crazy!!!!! Any help woiuld be greatly greatly appreciated.