Might we politely ask how much they charged you for this? Glass, seal and labor. [if a W126 uses a seal]
I used Safelite in Richardson for my W123. They did fine, it was my aftermarket seal that was the issue..... [never again will I use a non-MB seal, and they said they'd never install another windshield on one of these without an OEM seal]

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John