You're welcome. You don't need a wrench or socket to adjust it. Just a Phillips head screw driver. When you look at the adjuster, you'll see on top an opening where you can insert the screw driver. The teeth on the adjustment screw are for the Phillips screw driver to grab on to.
I suggest you find a nice level surface that has a wall or a garage door. Turn the lights on for your car and mark the hot spot of the beam on both sides with painter's tape. This will give you a reference as to how much you need to adjust the headlights from their current setting. It'll also allow you to make sure you have an even adjustment for both headlights.
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