Hi. I now have a humming/buzzing sound coming from behind the centre of the dashboard area. Seems to fill the area from the centre display unit and a bit lower. When the engine is switched off and on accessories it is quite loud and if the key is switched back on to either ignition or acc, it comes on again. When key is turned off totally, sometimes it ceases immediately, other times it keep going for up to 5 seconds and then switch off, or at least go away. Doesn't seem to affect anything obvious.
Any ideas please .