Hoping the broad experience of the members here can help. Situation: Transferring our '13 P85 with Studio Sound to my brother--his first Tesla. However, he has a full family with three daughters under nine, and a real job. Thus, he can't have a part time job like I do shuttling this Tesla to/from the SC for repeat visits on this recurrent problem: 1. The radio intermittently, but regularly, fails to begin to play upon opening the door, driving the car etc. Dead. 2. Raising volume to very high levels just gives slight static; changing to a new preset via steering wheel buttons has no impact. 3. Only way to regain radio functions is to go to media screen and select various functions such as "FM" etc. (Other radio issues of less import: radio forgets/erases presets, and won't scroll to any preset with an HD 2 station stored there more than once.) SC has had the car at least five or six times on this, and I've posted at least a dozen videos to document this on YouTube (private--with link only access), so they'll know I'm not making this up. Yet no fix. On every car we've ever owned, and there have been many, the radio simply works--WHY IS THIS SO HARD FOR TESLA TO FIX?!? Very frustrated as they have yet to replace a single component of the radio or MCU, despite these many, many repeat visits, claiming it's a software issue: "We rely on our engineers to help with these kinds of issues and when the problems are intermittent it is so challenging and frustrating to find the root cause." My hope: Someone here has had this problem and has a part number that can be replaced to solve this problem? Thanks in advance!