I have a 2010 North American Jetta TDI with a RNS315 radio that has gone bad. It’s draining the battery. Can I delete it from the ECU, pull the harness off it, and not have it impact the alarm system? Dealer tells me that if I pull the harness of it, it will cause issues with the alarm. Dubious as to that claim. Need a few days to decide what I want to do next. Thanks!