My 2010 VW CC is having a parasitic drain issue and I've isolated the problem to one of the fuses which is for the rear window raisers and for the central locking system. If I keep this fuse out overnight, I can start my car but if I leave it in and lock my car, it drains within a couple of hours and I have to jump my car. The problem with leaving this fuse out and calling it a day is that you're unable to lock the car. How do I begin to troubleshoot this issue? Where exactly is the "central locking system"?