WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
Using the control switch from the rear seat.
With "Rear Power ON" and rear control enabled the rear passenger can control the functions.
Fig 1: Using Control Switch From Rear Seat (Rear Controller)