What does the switch on the gear lever do?
The switch on the gear lever activates the overdrive capability of the vehicle. When O/D is on, the vehicle will select the 4th gear, and all the auto shift points will be altered. With it off, the transmission shift points are different (Sportier) but the selection of 4th gear is disabled. When the Switch is off (out) there should be an lite indicator in the dash that says O/D OFF.