What are city lights???

They are the 4 watt bulbs that are in your euro low beams. Some people refer to them as day time running lights or parking lights. The US headlights do not have these and are wired respectively because they function differently by design, the US outside lights have a high beam, the euro lights only use the low beam filament in the h4 bulbs. On your connector, the same position that the US headlights used for high beam, euro lights use for city lights. When you flip the light switch into 1st position, instead of the corner lights turning on, the 4watt bulbs should light up, so the corner bumper lights is where most grab their power from

Correct Euros come with screws and US comes with plugs. I replaced the screws with clips from my US grills but you can likely find them in a retainer clip kit.

A small sandblaster with fine grit material

They do actually. If you notice your lights aren’t pointing straight, all you have to do is twist the lens adjusters to center your lens. Great question thanks for asking