Maybe I missed it if this was discussed before, but I have discovered that to go between the various Radio Stations I use to twiddle with the large rotary dial on the dash or ferk about with the scroll type button on the steering wheel.

Well have "discovered" that if you press the button (on the front of the facia)for the radio twice it juggles back and forth between for instance DAB or a local pre-set station. Try it saves some valuable time taking eyes of the road etc.