2008 Mercedes CL-Class Owner's Manual - Page 537

Controls in detail Useful features Infrared reflecting windshield Infrared reflecting glass 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, transparent areas 1 and 3 are placed in the windshield. You can see them from certain angles when ambient light condition permit. Vehicles without Night View Assist* Vehicles with Night View Assist* 1 Transparent area (located left and right to the cover of the rain light sensor) 2 Cover of the rain light sensor 3 Transparent area 1 Transparent area (located left to the cover of the rain light sensor) 2 Cover of the rain light sensor 3 Transparent area 536