50% of all parking is initiated in reverse, if parking sensors engaged every time you went slow in drive...bumper to bumper traffic would be really frustrating....
I'll take needing to move my hand 2" to hit the very conveniently located parking button over needing to hit it thousands of times in traffic when i don't want it on.....
2012 GT 550ix Msport (feb12)(ok early march 12)
09 X5 4.8
12 X3 35i (the wife)
61 356 roadster