2009 Mercedes CLS-Class Owner's Manual - Page 154

Controls in detail Driving systems This means that: RYour vehicle can pass another vehicle after you have changed lanes. in a sharp turn or if the preceding vehicle is in a sharp turn, Distronic could lose sight of the preceding vehicle. Your vehicle could then accelerate to the previously selected speed. RWhile In such a case, 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 244). Offset driving 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 i If the message DISTRONIC Currently Unavailable - See Operator's Manual disappears during driving and the last set speed flashes for approximately 5 seconds, the dirt (e.g. slush) has dissolved; Distronic works again. Turns and bends stopped vehicle in a traffic jam disabled vehicle oncoming vehicle A vehicle traveling in your lane but offset from your direct line of travel may not be detected by Distronic. There will be insufficient distance to the preceding vehicle. Lane changing Ran The driver must always be alert, observe all traffic and intercede as required by means of steering or braking the vehicle. G Warning! 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 turns or bends, 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. 152