Hello. Bought a 53 plate SE a month ago and I'm having a problem with the built-in stereo. The controls (on, off, volume, tracking) work fine sometimes then jam up and don't respond other times. This includes the steering wheel-mounted controls. Sometimes you get a reactive "beep" but no function, other times you get nowt. This means that sometimes, you can't shut off the radio or even reduce/increase the volume! 90% of the time it happens, the radio functions with the ignition on but jams after the engine fires up. I have to shut off the ignition and switch it back on again to unlock the controls. All the heater functions are still active but the radio function is variable to say the least. Anyone had a similar problem? Any tips would be appreciated. Cheers!