Bottle holders are on the inside of the doors.

CAUTION
Do not use the bottle holders for containers without caps. The contents may spill when the door is opened or closed.
Cup Holder
Storage CompartmentsMazda 6 Owners Manual: Rear center seat belt removal/installation
Caution
The ELR has a spring that will unwind if the retractor's cover is
removed. The spring cannot be rewound by hand. If this occurs, the ELR will
not work properly. Therefore, do not disassemble the retractor.
4SD
1. Fold the rear seat back.
2. Remove the rear package trim.
3. Re ...
Mazda 6 Owners Manual: Driving Position Memory (Some models)
The desired driving position can be called up after programming the position.
The following driving positions can be programmed.
Driver’s seat position (seat slide, height adjustment, front edge of seat
bottom, seat recline)
Active driving display (display position, brightness level, dis ...