2007 Mercedes R-Class Owner's Manual - Page 274

Controls in detail Driving systems Distronic does not act upon adverse sight and distance conditions. Do not use Distronic during conditions of fog, heavy rain, snow or sleet. Warning! G Switch off Distronic: when changing from the left to the right lane if vehicles are moving more slowly in the left lane when entering a turn lane or highway off ramp in complex driving situations, such as in highway construction zones In these situations, Distronic will continue to maintain the set speed unless deactivated. Distronic is designed and intended only to maintain a set speed and keep a set distance from moving objects in front of it. Warning! G The "Resume" function should only be operated if the driver is fully aware of the previously set speed and wishes to resume this particular preset speed. Distronic cannot take weather conditions into account. Switch off Distronic or do not switch it on if: roads are slippery or covered with snow or ice. The wheels could lose traction while braking or accelerating, and the vehicle could skid. the sensor is dirty or visibility is diminished due to snow, rain or fog, for example. The distance control system functionality could be impaired. Always pay attention to surrounding traffic conditions even while Distronic is switched on. Otherwise, you may not be able to recognize dangerous situations until it is too late. This could cause an accident in which you and others could be injured. Warning! G Close attention to road and traffic conditions is imperative at all times, regardless of whether or not Distronic is activated. Use of Distronic can be dangerous on winding roads or in heavy traffic because conditions do not allow safe driving at a continuous speed. Distronic will not react to stationary objects in the roadway (e.g. a stopped vehicle in a traffic jam or a disabled vehicle). Distronic will also not respond to oncoming vehicles. 273