I thank everyone for the advices

I made everything and put back to my car

At least the switch lit up

But I'm sure that it is working(still , I will check it out tomorrow) , because I put the red plastic back on its board very nicely , I mean that plastic fixed to the board by a "click" sound and it looked very steady without doing anything else. Haha and luckily I had a non-used broken DIFF button so the lamp which lights up the word DIFF was the same as the one in that headlight switch , so it fitted nicely

I also re-soldered the DIFF button picture , well , the biggest one , I don't know how it is called

so , now what is left are the window buttons , because some of them don't glow in red. How to change those? And what lights to put in those buttons? Are they the same as the one which goes to the electric sunroof button?
You know , I have this car only for a week now , this is my very first car and everything is an adventure for me
