4 Wheel Drive/SUVs: ML 320 SUV performace upgrade, mercedes ml 320, filter system

Question
How can I improve the performance of my Mercedes ML 320 SUV, and roughly how much will that cost ?  

Answer
There are alot of things that you can do to enhance your performance , K&N filter system like $300 , you can put a Programmer in it to gain more horsepower thay range anywhere from 250, all the way to $1,000 just depends on how good of one that you want , Thanks ADAM