Chery SQR7240T User Manual page 127

Driving
To adjust waist-rest
Waist-rest regulating handle is located at external side of seat back. Rotate the handle to adjust the waist-rest.
When the handle points forward, the waist-rest will jack up; when the handle points upward slantwise, the waist-rest will be taken back.
Headrest
If during the running, your car is rear-ended by a car that follows, the headrest will protect your neck vertebra by limiting movement of head.
However, the protection is effective only when the headrest is rightly adjusted into place.