There is one for sale on MBworld.org IT says for a non amg but members on here seem to be running the A minus the 2 just fine. That is where i picked mine up just installed it today actually with my new green filters. I have had the most aggressive sprint booster you can get in my manual limited crossfire and it made it a rocket almost impossible to drive in bumper to bumper traffic. The seat of the pants feeling was similar to an evo. The one I installed tonight was the less aggressive one with the 2 on the end. IT is for the AMG engine and is recommended. Very noticeable difference not as aggressive but the way the car should have been from factory. It feels good to chirp second...