Cleaning Pano Roof Glass on exterior
For "polishing", i.e getting out some rougher stuff off of it, I'd think to maybe use a Cleaner Wax (kill two birds with one stone).

On that note, is it recommended to Wax a Pano roof at all?
fwiw, the pano is glass. Just use a glass cleaner like Stoner's Invisible Glass; clay bar the exterior glass once a year to get rid of embedded pollutants.

2010 Manual:
Cleaning the panorama roof
The rear part of the tilt/sliding panel has a
protective layer on the inside.
X Use a soft, clean cloth and a mild window
cleaning solution.
An automotive glass cleaner is
recommended.
! Do not use a dry cloth, abrasives, solvents
or cleaners containing solvents. Do not
touch the protective layer with hard objects
such as an ice scraper or ring. Never apply
strong force and only use a soft, nonscratching
cloth when cleaning the rear
part of the tilt/sliding panel.
Otherwise you may scratch or damage the
protective layer.
2009 Manual:
Cleaning the panorama roof
The rear part of the tilt/sliding panel has a
protective layer on the inside.
X Use a soft, clean cloth and a mild window
cleaning solution.
An automotive glass cleaner is
recommended.
! Do not use a dry cloth, abrasives, solvents
or cleaners containing solvents. Do not
touch the protective layer with hard objects
such as an ice scraper or ring. Never apply
strong force and only use a soft, nonscratching
cloth when cleaning the rear
part of the tilt/sliding panel.
Otherwise you may scratch or damage the
protective layer.
And yeah, the pano is the same unit on the W211 and the W212.
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