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
If you cannot lock or unlock the vehicle with
the SmartKey, either the battery in the
SmartKey is discharged, the SmartKey is
faulty or the starter battery is discharged.
Check the battery in ...
Problems with the occupant classification system
WARNING
If the indicator lamp
illuminates and remains illuminated when the weight of a typical
adult or someone larger than a small individual has been detected on the
passenger seat, do ...
New: Active Body Control (ABC) compensates crosswinds
Mercedes-Benz developers have also added a crosswind stabilisation function
(standard for S600) to Active Body Control (ABC). For this purpose ABC uses the
yaw rates and lateral acceleration senso ...
