2007 Mercedes GL-Class Owner's Manual - Page 346

Controls in detail Useful features Compass Calling up the compass Press button è or ÿ repeatedly until the off-road menu appears in the multifunction display. The compass displays the direction into which the vehicle is currently traveling: N, NE, E, SE, S, SW, W, or NW. To make sure the display is correct, the compass must be set to the proper geographic zone ( page 181). It may also be necessary to calibrate the compass ( page 182). Infrared reflecting windshield* i If the compass is not calibrated or its function is impaired by outside influences, the message Compass - - - appears in the multifunction display. 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. i The presence of buildings, bridges, power lines and large antenna masts can influence the displayed values. Metallic or magnetic objects in or on the vehicle can influence the accuracy of the compass. 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, three infrared transparent areas 1 are placed in the windshield. 345