headlight adjustment on 89 300E...

hi...i have a 89 300e with the us-spec. headlamps...even on these lights, i know that there are vertical and horizontal adjustments for the beams...my question is, which of the two knobs corresponds to the vertical adjustment...my light pattern for the left headlamp seems to be "shorter" than the right one, with most of the light concntrated 5-6 feet in front of the car, while the right headlight extends far into the distance...also, which direction do i turn to have the vertical adjustment go up...clockwise or counterclockwise? thanks...

ben