Car was fine the night before but totally dead the next day. No interior lights and ignition wouldn’t turn. Steering wheel also locked. Thought it must be dead battery. Tried the mechanical key and it started with no problem. But screen doesn’t come on, interior lights still not working and a continuous beep sounds when car is put in reverse or drive. Searched here and online, but can’t find an answer. Anybody have an idea of what’s going on?