The infrared reflecting glass prevents the vehicle interior from becoming too hot. It also blocks radio waves up into the gigahertz range.

Vehicles without Night View Assist Plus

1 Areas permeable to radio waves (to the left and right of the rain sensor cover)
2 Rain sensor cover
3 Areas permeable to radio waves

Vehicles with Night View Assist Plus

1 Area permeable to radio waves (to the left of the rain sensor cover)
2 Rain sensor cover
3 Areas permeable to radio waves

In order to operate radio-controlled equipment, e.g. toll recording systems, areas 1 or 3 on the windshield are permeable to radio waves. In these areas, you can install radio-controlled systems.

These areas can best be seen from outside the vehicle by observing the light reflected off the windshield.