i-activesense

I have a brand new 2017 CX-5 Grand Touring with stop and go cruise control. About 50% of the time I use the cruise control, I get this message: "Mazda Radar Cruise Control Disabled under 20 mph". The radar faceplate and the camera are both clean (I get a different message when they are...

(uhm)I am looking at a CX-5 with the Technology Package and wonder if the i-ActiveSense be added after the fact/purchase? Used car with 3500 miles on it. If so, anybody wonder what the cost may be?

Haven't had any luck with dealer service department yet (though they are trying), hoping someone here has some ideas: Purchased new 2016 CX-5 GT AWD w/i-ACTIVESENSE at the end of March, and within a week started receiving the following two error messages on my info panel: "Smart City Brake...