So when I bought my car the audio and everything worked fine, then it sat for about 2 weeks and moved maybe twice while I waited to be able to register the vehicle (appointments at the DMV are scheduled a month ahead here). Now the I have no radio function/nav function and no audio at all. When I open the door the nav screen displays BMW but after that nothing else. Not sure of the age of my battery but tomorrow I will go check it out and see if a need a new one or a recharge and hopefully that fixes the issue. Any other ideas on why my radio could be doing this? Could it possibly be the amp? Any help will would be appreciated