In addition to some interesting but largely unneeded tools a web address is included, where you will find the instructions for installation of the glass. But this site turns out to be extremely confusing and reference is made finally to a tutorial on Youtube that shows the installation in English. Since I have made myself beforehand about the installation procedure clever, I was able to draw on a much better tutorial, and cope with the mounting problems eventually.
Conclusion: Anyone who values a front window in the right color, applies here: Stay away!
Those who still want to try: informed well before the installation and then start with a lot of patience. I Wish You Success!