Well I've got the car back, they ran tested on the system etc and said theres no faults/errors with it so its working but if my manual mentions Media Player functionality to let them know & then they can raise it to "Fiat Technical" and then we'll see whats what.

So i'll dig out my manual later and search for any sign of Media Player function, then decide if its worth going through the hassle

I'm guessing as long as the bluetooth function is working it must be an issue with the tomtom. When I first got mine Blue&me didn't work at all so I sent to to tomtom and they reprogrammed it FOC.