Radio Won't Turn Off After Battery Disconnected
 

I cleaned my MAF sensor yesterday and disconnected the battery to reset the check engine light. Now my after market(Kenwood KDC-248U) stereo will not turn off when the key is taken out of the ignition. I have a 2007 VW Passat Wagon 2.0T. Is there something I need to do, to reset settings so that I don't have to manually turn my stereo off each time I leave the car. I had the stereo installed at a local Best Buy(Geek Squad) and it worked perfectly without any problems up until yesterday when battery was disconnected.

Welcome to the forum. Attachment 3212

I've never heard of that but if you Google it. Radio after battery pull