Originally Posted by kacz07

If you look at the fourth picture it shows the shift knob moving back and forth. It also says BMW z4, which is really weird, but thats beside the point.

Anyways, the shift knob looks like if you move it to the left in neutral, the car will initiate a downshift. If you move it to the right, the car will initiate an upshift.

The mechanism is the direction the shift knob moves while it is in neutral.

That's my guess.