Other information:
Front head restraints
Height adjustment
Upwards: pull the head restraint up to the desired position; the
head restraint can be felt to click into position.
Downwards: press lug A to lower the head restraint.
The adjustment is correct
when the upper edge of the head restraint is level with the top of the head...
Load distribution
Distribute the load in the trailer so that the heaviest items are as
close as possible to the axle, and the nose weight approaches the maximum
permitted without exceeding it.
Air density decreases with altitude, thus reducing engine performance...