11Edge

Like I said there is no O/D switch on a 2011 Edge, that is a grade assist button and your picture clearly states that. What that does is cancel Overdrive and puts the transmission into a different mode that alows it to brake when the vehicle meets certain conditions. Please read the picture that you attached so you can understand it is not a O/D button and so you can actually find out what the transmission does when you activate the grade assist feature.

 

I cant find anywhere in the Manual where it says there is an O/D button on a 2011 Edge.

 

Now on older vehicles there is a O/D switch and it does turn off O/D and that is all it does, on a 2011 Edge that switch does much more that the old school term you are using.

First sentence of the picture says "Pressing the transmission control switch on the side of the gearshift lever activates Grade Assist and cancels Overdrive".

Last sentence says "It is recommended that you return to O/D (overdrive mode) on flat terrain to provide the best fuel economy and transmissio function". The Grade Assist button is a dual function button. Turns on Grade Assist and turns off O/D. Press it a second time and it turns off Grade Assist and turns on O/D. At least that is how I read it.

My Edge has manual mode and the button on the side of the shift lever is for manual shifting, so I will have to read about Grade Assist for my car.