I've seen parking sensor topics but haven't quite found the answer to my issue. I have a 2012 L322 Supercharged. That all being said I just bought it used and realized none of the parking sensors work and the P button doesn't light up or anything. I checked the fuse, listened to the sensors and tried to read through the threads. My question I guess is, how do I know if its the control mod? Is there something else I should check? Or do I order new module? Thx for any advice!