Good Leonardo, you are a little wrong. I explain you, Overdrive is not automatic pilot, that in any case is the Cruisse Control that sets the acceleration electronic for long trips and not having to keep your foot in the accelerator. The Overdrive would be the envelope or on direct march, and is used in automatic boxes to give a more march to the one that originally leads and thus takes better advantage of the rpms of the engine with respect to the speed with which it generates a better consumption. I explain? With respect to the fact that it does not release the park point with the brake I tell you that it carries a selenoid at the foot of the lever that is activated with the same hot line of the brake lights. You must take the time to disarm the small console at the foot of the lever to find the problem, unless you realize that you do not have brake lights with what could be the pedal switch or the fuse of the brake lights.