I want to restore my 1992 300ce with 123k miles on it. I have always put 91 octane in it (the highest here in California) Over the past few months the car has been getting REALLY sluggish. My throttle is not responsive at all, gas millage is through the roof, and overall its about time the car got some new parts...

Can someone list a bunch of things that would most likely need changing or that would make my car run better overall, for example, spark plugs, spark plug wires, fuel pump, air filter, fuel injectors, o2 sensor, distributar cap/rotor. Thats all I can think of...any other suggestions