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:
The M-Class also protects its occupants after a crash
As part of the POST-SAFE® functions, the new M-Class can activate a variety
of systems which can contribute towards avoiding post-accident risks. After a
more serious crash, the hazard warning lig ...
MB Info call button
Open the stowage compartment under the
armrest.
Press and hold MB Info call button 1 for
more than two seconds.
This initiates a call to the Mercedes-Benz
Customer Assistance Center. The i ...
Kickdown
Kickdown is not possible in manual drive
program M. ...
