This may well be a road I do not want to travel down, but I hadn't fully appreciated that the Bluetooth in a Dension unit would not necessarily play nicely with the car's bluetooth.

Having got my Dension now working correctly (which really was the goal of music over A2DP), I have been advised by their help desk that to clean up the not great quality of calls over Bluetooth (using the Dension rather than the car) would probably require me removing the OEM Telephone from the MOST loop so that the Dension and Car were not fighting each other.

Does anyone have any guidance on this? I would assume that I can unplug the "in" and "out" fibre optic leads from the OEM telephone kit and insert them into an inline socket (which I have left over from the install) in order to continue the loop of light. Any ideas where the telephone "brain" is based?

TBH I really don't want to get into taking the car to pieces to do this job! But if it does the trick and is easily done/reversible I'm willing to give it a try.

Dan