Having it done properly the first time is be important, when choosing who to do it. You could call the Mercedes dealer and ask them which shop THEY use for these jobs.

Sekurit, Sigla or PPG glass I think would be the best to use.

I hope your sunroof drains are clean, so you know from the start there will be no leakage into the interior.

__________________
1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)