Postby AZ_Path » Tue Aug 03, 2010 12:29 pm
According to page 5-16 in the manual it is needed if the battery is discharged and the shift lock will not disengage even with the key in the ignition and your foot on the brake pedal. I would assume from this the shift lock needs power to operate and therefore a dead battery means you won't be able to shift it out of park, hence you use the release button if you want to put it in Neutral to tow it.