"edit: as gambiting commented, the button I am referring to is the P button, it is located on a stalk on the right hand side of the wheel, which is dedicated to

"edit: as gambiting commented, the button I am referring to is the P button, it is located on a stalk on the right hand side of the wheel, which is dedicated to shifting P N D R. It is not on the windshield wipers stalk. The windshield wiper stalk on this car is located on the left hand side of the wheel, above another stalk for the turn signals. Driving this Mercedes was utterly confusing. " I completely agree. As I mention further down, we had a E350 4matic wagon for several years and even after 3+ years of driving it regularly, if I pulled into a parking spot and needed to: - Shift into park - Turn off radio - Turn off ignition They are all identical button presses. I would often do them in a weird order or hit park and wonder why the radio was still on ... or worse, would need to quickly mute radio while driving and reach up to press P on the stalk since that's my muscle memory (I never actually did that). I am neither a dummy nor am I uncoordinated - it's really striking how having a bunch of "stop actions" all be identical tactile actions jumbles up. The primary drive interface for the automobile should be a different physical interface than the radio or the cruise control or the map screen. You should shift into gears/modes - not button press or gesture or voice into them.