I have the same problem... flashing odometer, no blue&me and the usb socket in glovebox seems to have no power to it as it wont charge my phone now either.
Battery went flat over winter as i too didn't drive it very much... Ive just disconnected the negative battery terminal and left it for 45mins, reconnected (nice and tight) done the reset on the windows (Brera) and still nothing... no blue&me, no response from the voice recog button on the steering wheel and still flashing odometer...
No engine warning lights, so i guess thats something.
Shall i do it again? im a bit stumped to be honest... i thought the reset would cure it.