Have a look at Windshieldstogo.com ( This is Pilkington / PPG / PGW ) You can get pricing for installed and not installed. Does your car use a gasket or is the glass glued in? If gasket, buy a new one.

Others have reported that older glass is available at the MB dealer and at reasonable cost.

Safelight is allover the US so install quality may vary. Regardless of who installs, make sure they touch up any paint scratches when the glass is removed. Some installers are not so careful and rust will start growing under the trim causing problems years from now.