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

In order to operate radio-controlled equipment, e.g. toll recording systems, areas 1 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.
See also:
General notes
WARNING
All categories of messages contain important information which should be taken
note of and, where a malfunction is indicated, addressed as soon as possible at
an authorized Mercedes- ...
Side impact air bags
WARNING
The pressure sensors for side impact air bag control are located in the doors.
Do not modify any components of the doors or door trim panels including, for example,
the addition of d ...
Problems with the windshield wipers
The windshield wipers are obstructed
Leaves or snow, for example, may be obstructing the windshield wiper movement.
The wiper motor has been deactivated.
For safety reasons, you should remove t ...
