Got an 07 Audi A5 Quattro 3lt Diesel a week ago - the manual tells me that that Cruise Control in on a separate stalk on the left of the steering column - but it's not! I only have 2 stalks - right hand for windscreen wipers and on board computer (left for indicators etc) - I accidentally set...

I have been using the cruise control (the standard one, not the adaptive) quite a bit recently, and it made me curious -- how does the cruise control lower the speed? I use this functionality quite often -- when you are driving along on a road and the speed limit goes from for example 110 to 70...