Chrysler 2006 PT Cruiser Sedan - Manual (Page 172)

the left side seatback. Pull the right side seatback release
knob to fold down the right side seatback. 2. From inside the vehicle, fold the rear seat back down
flat.
Folding Rear Seat Release Knobs
Folding Rear Seat Back
172 UNDERSTANDING THE FEATURES OF YOUR VEHICLE