and not SWMBO, but started intermittantly from somewhere on the driver's side either in the dash or in the engine compartment in front of the dash (IYSWIM). Went to a constant noise. Went away when I switched off and hasn't come back this evening.
Fan for the digital display electrics, I would imagine. There is certainly one in there somewhere, though I can only hear it sometimes. Can't tell if it is temperature-sensitive fan speed that I'm hearing, or a constant fan and variable loud pedal
