OK folks, solve this one for me. When I'm driving along, seemingly at random, my doors unlock (all of them, full central locking etc) and the radio turns off. Locking the doors again is a button press away and usually they stay locked again, but getting the radio back on is a farce - sometimes it comes on for seconds before it's gone again, other times a minute or two, but it rarely comes back and stays on first time, leading to a game of "press the button, wait, press the button, wait" etc that usually leads to me exploding in frustration. Interestingly, if I'm on a call when it happens then the headunit stays on (the doors still click etc). The car acts as if I've parked up, essentially - radio off, doors open. Which is useful when you arrive at home; it's nothing but an annoyance as you're driving along. Has anyone else witnessed anything like this, and know what the root cause is? Importantly - is it an expensive fix, if it needs work?