2009 Mercedes CL-Class Owner's Manual - Page 363

Controls in detail Driving systems The DISTRONIC Plus regulates only the distance between your vehicle and those directly ahead of it. It may not register stationary objects in the road, e.g.: Ra Ra stopped vehicle in a traffic jam disabled vehicle oncoming vehicle Manual disappears during driving and the last speed stored flashes for approximately 5 seconds, the dirt (e.g. slush) has dissolved; the DISTRONIC Plus is available again. Another cause might be that the radar sensors have been manually switched off in the instrument cluster control system. Please verify that the radar sensors are switched on (Y page 247). Turns and bends Offset driving 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 Plus should not be used in snowy or icy road conditions. The most likely cause for a malfunctioning system is a dirty sensor (located in the hood grille and in the bumper), especially at times of snow and ice or heavy rain. In such a case, the DISTRONIC Plus will switch off, and the message DISTRONIC PLUS Currently Unavailable See Oper. Manual appears in the multifunction display. For cleaning and care of the sensors, see (Y page 465). A vehicle traveling in your lane but offset from your direct line of travel may not be detected by the DISTRONIC Plus. There will be insufficient distance to the preceding vehicle. Lane changing i If the message DISTRONIC PLUS Currently Unavailable See Oper. In turns or bends, the DISTRONIC Plus may not detect a preceding vehicle, or it may detect one too soon. This may cause your vehicle to brake late or unexpectedly. Z 361