I have an s430 and I took car in for servicing (B check) approx. 1 month ago and they did a recall that upgraded the dashboard. 2-days ago I went ot turn on my car and the radio and nav is not on. The reading onthe dashboard says no malfunction but I can turn onthe radio. It's programmed to off and when I press the radio button or nav I can't turn on. Help is this a quick fix of do I need to take back in???