Fortunately, I can give a crap less on what they call their design. Naming a design is nothing but a sales tactic to me. The 21 signature looks better, drives better, and feels better than my 16.5 GT.
Are you mistaking this with radar cruise control with stop and go? My 21 signature engine doesn't shut off when coming to a stop. My f150 does and it is seemless. A lot of people disable it, but.i don't mind it.
My guidance is that is is a waste of money. The cx5 is extremely reliable. You can find a good independent mechanic to do maintenance for less than the maintenance package. Of course they make money on this! If they didn't they wouldn't offer it!
I would've been surprised if the dealer's mechanic specifically looked for things to be fixed under warranty. If you took care of the car you will have nothing to worry about!
Checked this out this morning in the car.
By switch I am assuming you mean the "fast forward and rewind" buttons on the steering wheel.
When in FM/AM mode the buttons will switch between saved stations.
While listening to SiriusXM the buttons act as a fast forward and rewind.
Whichever...