Hello in having problems with my 1994 Mercedes-Benz C280. The car starts and idles fine until it warms up when it warms up the Idle becomes rougher and harsher. When the car is put in drive or reverse, The car shakes even more violently and harshly. It's even worse when the air conditioning is on. When I need passing power or when I need to merge into the highway or go above 2000 Revs or one third of the throttle, the engine just starts shaking and making a popping noise. Im not sure what to do at this point. There is a check engine light on that says cylinder six misfire. Can someone please help me!