The rear armrest in the center of the rear seatback can be used (no occupant in the center seat) or placed upright.

WARNING
Never put your hands and fingers around the moving parts of the seat and armrest:
Putting your hands and fingers around the moving parts of the seat and armrest is dangerous as they could get injured.
Split Folding
Head RestraintsMazda 6 Owners Manual: Roof molding installation
1. Attach the roof molding to the T stud at the A section.
2. Press in the roof molding along the direction (1) shown in the figure and
attach it to the clip A at the B section.
3. Hook the roof molding to the clip B at the C section, press it in, and
attach the roof molding to the clip B.
...
Mazda 6 Owners Manual: Tire Chains
Check local regulations before using tire chains.
CAUTION
Chains may affect handling.
Do not go faster than 50 km/h (30 mph) or the chain manufacturer's recommended
limit, whichever is lower.
Drive carefully and avoid bumps, holes, and sharp turns.
Avoid locked-wheel braking.
Do not ...