2005 Mercedes-Benz C230 Kompressor

This car is driving me nuts, I bought it to try to fix it... 1st off it does turn on but sound like a diesel tractor... it gives me misfires on all 4 cylinders and camshaft bank 1 position sensor ... Please watch and listen to it and if anyone out there knows or can give me some pointers please do so....
** I already made sure the spark plug gaps are correct
** replaced both camshaft sensors
** replaced camshaft position magnets
** new fuel filter
** air filter
** coil packs
** can't check oil level, dash display seems to not give me the oil level