Mercedes Benz 2007 r 320 cdi User Manual

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Controls in detail
Useful features
Infrared reflecting windshield*
1 Infrared transparent areas
Your vehicle is equipped with infrared 
reflecting glass, which reduces the amount 
of radiated heat entering the vehicle 
interior through the windows.
The infrared reflecting glass also prevents 
the transmission of signals through the 
glass by in-vehicle electronic devices, e.g. 
electronic toll collection devices.
To allow the use of these devices in the 
vehicle, infrared transparent areas are 
placed in the windshield.