Correct answer
as small as possible and never more than 4 cm.
Before starting a journey, we must correctly adjust all passengers' head restraints, adjusting the seat so that the distance between the head and the head restraint is as small as possible and never exceeds 4 centimetres. We must also ensure that the centre of gravity of the occupant's head, that is, the height of their eyes, coincides with the central part of the head restraint.
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as small as possible and never more than 4 cm.
whatever is most comfortable for the driver.
more than 4 cm.
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