VW problem. My missus' VW Polo has the same problems. I did work out that a brand new, known-good cable and working out that pressing and holding the power butt

VW problem. My missus' VW Polo has the same problems. I did work out that a brand new, known-good cable and working out that pressing and holding the power button to hard-reset the dash would get it to finally start connecting every time (or connect properly after it's done its "I'm useless" failure mode)