That's something that shouldn't be taken lightly by Porsche...I went over to Rennlist and leafed through the 16 pages of the thread. Bottom line is the factory did screw up and it appears it is a simple fix by installing the correct console with the correct buttons and doing a little coding. The wiring harness is the same as you might imagine. BTW, another GT3 owner chimed into the thread that his was missing the button also. So somebody was asleep at the switch at Porsche (pun intended).