I have a '91 300 SL on which the headlights have been replaced, so the Owner's Manual headlight aiming procedure is no longer applicable. The replacements are Bosch and have xenon low beams and halogen high beams. They may be from a later model 129. I can find vertical adjustments for both low beam and high beam, but I can't find horizontal adjustments for either.

Does anyone know of an adjustment procedure for this type of headlight?