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 as far away from the driver's airbag as possible
you are sitting in a normal upright position
your thighs are slightly supported by the seat cushion
your legs are not entirely stretched 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 in the instrument cluster clearly
you should have a good overview of traffic conditions
the seat belt is pulled snugly against the body and must be routed across the centre of your shoulder and across your hips in the pelvic area