2010 Mercedes GL-Class Owner's Manual - Page 156

154 Driving systems The Distronic regulates only the distance between your vehicle and those directly ahead of it, but does not register stationary objects in the road, e.g.: Ra Ra Offset driving stopped vehicle in a traffic jam disabled vehicle oncoming vehicle Controls in detail Ran The driver must always be alert, observe all traffic and intercede as required by means of steering or braking the vehicle. G Warning! The Distronic should not be used in snowy or icy road conditions. The most likely cause for a malfunctioning system is a dirty Distronic system sensor cover (located in the hood grille), especially at times of snow and ice or heavy rain. In such a case, the Distronic will switch off, and the message DISTRONIC Currently Unavailable - See Operator's Manual appears in the multifunction display. For cleaning and care of the Distronic system sensor cover, see (Y page 278). A vehicle traveling in your lane but offset from your direct line of travel may not be detected by the Distronic. There will be insufficient distance to the preceding vehicle. Lane changing i If the message DISTRONIC Available Again appears during driving, the dirt (e.g. slush) has dissolved; the Distronic works again, if you reactivate it (Y page 151). Turns and bends The Distronic has not yet detected the vehicle changing lanes. There will be insufficient distance to the lane-changing vehicle. Narrow vehicles In turns or bends, the Distronic may not detect a moving vehicle in front, or it may detect one too soon. This may cause your vehicle to brake late or unexpectedly. Because of their narrow profile, the vehicles traveling near the outer edges of the lane