if you adjust the driver's seat, the head restraints, the steering wheel or the mirror while the vehicle is in motion
if you fasten your seat belt while the vehicle is in motion
, seat belt 
and driver's seat 
: you are sitting as far away from the driver's airbag as possible, taking the following points into consideration.
you are sitting in an upright position
your thighs are slightly supported by the seat cushion
your legs are not fully extended and you can depress the pedals properly
the back of your head is supported at eye level by the centre of the head restraint
you can hold the steering wheel with your arms slightly bent
you can move your legs freely
you can see all the displays on the instrument cluster clearly
you have a good overview of the traffic conditions
your seat belt sits snugly against your body and passes across the centre of your shoulder and across your hips in the pelvic area