X-Type 2.2 D 2007.
Suddenly, the low beam headlamp started to point downwards and the adjustment from both the trimmer in the dashboard panel and from the left adjustment screw (the one where you insert a 5-point Allen wrench) could not compensate. After removing the battery and the cover of the parabolas I realized that the whole body of the parabolas was floating, free to position itself. To be able to adjust it the same had to be pushed upwards against the motor adjustment mechanism.
My question is: what forces the lighthouse body to be pushed upwards, a spring or what? I could not understand it and comparing it with the right headlight is extremely inconvenient because the headlamps make it difficult to access and remove the cover.
For now I have remedied putting a piece of foam between the parabola and the upper body of the headlight, so the parabola remains pushed upwards and I can adjust it as you like.
Who can tell me what forces the parabola body to be pushed upwards, in contact with the regulation system? A spring? Where is it ? I've looked at Parts Catalog but nothing is mentioned.

 

I've found a complete thread (Headlight issue) that answers all my question. Very interesting.
Ballpoint broken can be ordered on e-bay. What I found annoying is removal of bumper and opening the light assembly.