As old empty nesters the only one who rides in the back seat of our E350 is our dog. I want to remove the rear seat headrest to give me more rear visability. The owners manual says to fold the rear seatback forward and pull the rest out. The problem is I have basic seats that do not fold down. I tried to remove the rests but they hit the roof before they are out of the mount. Is there any way to remove the rest if the seat does not fold forward?