Fog Light, Adjustment

Measure the distance between the center of the lens and the floor. Mark the wall (at 90° to the lens) with a cross at the same height.

Fig 1: Measuring Distance Between Centre Of Lens And Floor
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Switch on the fog lights.
Turn the adjusting screw until the light is below the cross by approximately 1-2% of the distance between the car and the wall (e.g. 10-20 cm under the cross if the distance between the car and the wall is 10 m).

Fig 2: Illustration For Step 3
Courtesy of SAAB-SCANIA OF AMERICA, INC.