2011 Mercedes R-Class Owner's Manual - Page 181

Driving systems Setting in 5 mph (Canada: 10 km/h) increments X 179 Storing the current speed or calling up the last speed stored G Warning The set speed stored in memory should only be set again if prevailing road conditions and legal speed limits permit. Possible acceleration or deceleration differences arising from returning to the preset speed could cause an accident and/or serious injury to you and others. X X Briefly pull the cruise control lever towards you ?. X Remove your foot from the accelerator pedal. DISTRONIC is activated and accepts the current speed if it is activated for the first time, or adjusts the vehicle's speed to the last speed stored. To increase: turn thumbwheel ; towards =. DISTRONIC then maintains a greater distance between your vehicle and the vehicle in front. X To decrease: turn thumbwheel ; towards :. DISTRONIC then maintains a shorter distance between your vehicle and the vehicle in front. i Make sure that you maintain the minimum distance to the vehicle in front as required by law. Adjust the distance to the vehicle in front if necessary. DISTRONIC displays in the speedometer Setting the specified minimum distance You can set the specified minimum distance for DISTRONIC by varying the time span between one and two seconds. This time span determines the distance that DISTRONIC should maintain from the vehicle in front, depending on the road speed. You can see this distance in the multifunction display (Y page 180). G Warning! It is up to the driver to exercise discretion to select the appropriate setting given road conditions, traffic, driver's preferred driving style and applicable laws and driving recommendations for safe following distance. When DISTRONIC is activated, one or two segments in the set speed range light up. i For design reasons, the speed displayed in the speedometer may differ slightly from the speed set for DISTRONIC. Z Driving and parking Briefly press the cruise control lever beyond the pressure point, up : for a higher speed or down ; for a lower speed. The last speed stored is increased or reduced.