CU2 bluetooth and Apple watch

I was told by the salesman in the Apple store that if I paired my iPhone (latest ios) to a new Apple watch, I would lose the connectivity that I currently have with the in car audio/phone system.
I have researched this on the internet and found many conflicting stories. It seems to work for some and not for others.
I have also spoken to someone who has first hand experience with the watch and a Ford Territory and he has no problems.
It might be car/model specific so my question is, does anyone on this forum have a CU2 and an Apple watch and does it work?

i have cu2

i also have apple watch


they both work