Headlight beam on a daf cf

It can be done, If you open the door at the top step there is a rectangular inspection plate held on with 2 torx screws,remove it and reach inside behind the headlight and you will find a black plastic knob which adjusts the dip beam, half to a full turn each side will lower enough to reduce glare, easiest way is to face a wall or back of another trailor so you can see the beam clearly.