I have a 2010 with hitch installed at PDC (as close to factory installed as you can get), haven't towed anything yet, but definitely did not notice this "zoom" view. Will go check the car and report back.

UPDATE: I checked my car and it does not offer the zoom function or the lines shown above when in back view. Anyone think this could be an M-only function? Is there any way to actually check if your car has the hitch programming without plugging a trailer in? I don't have one handy - but there must be a screen that shows a list of programming installed, right?