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I would like some more information about the Sun Protection Glass in a BMW .

Vehicles specified with Sun protection glass have a light transmittance value ranging between 18-42% and shading between 58-82%.

This applies to all glazing behind the vehicle B-pillar including the rear-side windows, rear screen and where fitted, the glass sunroof. The precise light transmittance and shading values vary per model and different glass suppliers.

The front screen and front-side windows have a light transmittance of 78 (+/- 2) %.

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