1994 c280 performance
 

Hi i have a 1994 c280 is there anything under a thousand dollars that i can do to make it faster? It has a 6 in it already.

Lots of aftermarket specialists will give you the usual song & dance about air filters and exhausts, but they normally will make your MB slower and louder. The notion that an aftermarket company can, without knowing the reasoning behind the existing engineering design, come up with something cheap that will somehow magically transform a car like a MB is laughable. Save your money for future repairs. Leave it stock. MB engineers knew exactly what they were doing. Some may point to some of the aftermarket tuners (true tuners of MB, not marketing types who flog the very same product for every make of car) who truly can make your MB faster. Be prepared to pay dearly for the engineering work they have done.