1) All head lights can be adjusted manually and you can find these adjustment knobs on the top part of the lamp when you open the bonnet and you can adjust them by a philips torx head driver. In the case if your car is fitted with an auto leveling device, you can also set the level at the control module attached to the lamp, it is visible anyway. I wonder whats wrong with your mechanics? 2) You need to check whether the problem came from either the sphere or other mechanical linkage to the suspension system. I believe if you can raise up your car with the Hydractive system and apply weight to make an up down bouncing movement, you can already know whats wrong. Try it! 3) The brake squeel could be due to the uneven wear condition of the pads against the Disc, usually what happen to the front pads is the friction width is smaller than the disc and causing incomplete wear to the disc, you can feel with your finger by touching the edges on the external and internal diameter to feel the uneveness, remove this uneven surface and your problem could be solved.