hey is there any way i could make an ml 320 a little faster and a little more power full i already have a k &N and i put water weter in the coolent but wat is a good exauset i could put on it

How much money you got?

It can go as fast as your wallet will allow.

Try Brabus, or renn tech.

Well, I am an installer/dealer of RENNtech go-fast-look-good upgrades. Real HP is not cheap, therefore:

ML 320,
Stock Horsepower 215 @ 5,700 RPM
Stock Torque 233 lb-ft @ 3,000-4,600 RPM

Carbon Fiber Airbox and ECU Upgrade:
After:

Horsepower Gain 20 Torque Gain 20 lb-ft
Total Horsepower 235 @ 5,700 RPM
Total Torque 253 lb-ft @ 3,000-4,600 RPM

This will be about $2,895.00 plus shipping. You will need to remove your ECU and mail it in to get reprogrammed. If you reside within our coverage area, I can come out, remove your ECU, have it reporgrammed and then reinstall it with the new Carbon Fiber Airbox.

Happy Motoring!