I regret that I did not give air pressure to snout hole.
I already fabricated supercharger and installed.
Hope someone test it later~~~^^

Mercedes should have reason to design this hollow bolt which is weak than solid. (Preventing overtightening could be done by more easy and cheep method)
I saw that the length of the hollow bolt is abnormally shorter than depth of snout thread, that means there shoule be popose of connecting bolt hole and snout hole.