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
, safety belt 
and driver's seat 
: Sit as far away as possible from the driver's airbag.
Sit in an upright position.
Your thighs are slightly supported by the seat cushion.
Your legs are not fully extended and you can easily fully press on the pedals.
The back of your head is supported at eye level by the middle part of the head restraint.
You can reach the steering wheel with your arms in a slightly bent position.
You can move your legs freely.
You can easily see all displays on the instrument display.
You have a good overview of the traffic situation.
Your safety belt fits securely around your body and runs across the middle of your shoulder, your pelvic area and groin.