i had my windscreen replaced recently by autoglass on my touareg,i was a little worried about them replacing it so i guided the engineer towards a repair the repair wasn't 100 % successful because the chip had cracked but i paid the £10 excess anyway.I then had a change of mind and got back in contact with them ,they came back and replaced it free of charge under there warranty scheme (would have been £500 if i was paying) and ive got to say they were excellent.
The new screen comes with all the necessary bits to fasten the rain/lights sensor back to the new screen.
I would thoroughly recommend Autoglass their engineers were excellent.