Hey Scotty, I change the battery in 2012 VW Passat and the entertainment center will not work. I checked the fuses and the 40 amp one was blown. When I went to change it, it sparked nice and poped the fuse right back out. Let me mention that i crossed the wires on the battery swap. What should i do?

once you crossed those wires, you fried all kinds of stuff on a VW. Pray it's a shorted wire and not a shorted computer module. It's often a module though, takes a VW expert to figure that one out