Replace both fuel filters first. (You can order them from fast lane above.)

There is a part called the aneroid valve. It is responsible for adding more fuel when boost is detected, you may want to give it a tweak to get more fuel to the pump, this will improve power GREATLY, but will cause a little more smoke.

Good luck.

__________________
Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS