Mine does that too. But, my exact model number comes up as not supported, so, I guess I'm lucky it works at all.
But, to get it to work again, unpair/delete pairing from both your phone and the Infortainment Center, turn both off(power off both), count to approx 30 mississippi's, turn them both back on, re-pair them, and it will work for another 2 days to 2 months, usually around 2 weeks.