2008 Mercedes R-Class Owner's Manual - Page 263

Controls in detail Driving systems Adjustment in 5 mph (Canada: 10 km/h) increments Setting to last stored speed ("Resume" function) Warning! Distronic* (Canada only) The Distronic is available on the R 550 4MATIC only. When activated, the Distronic adaptive cruise control system increases the driving convenience afforded by the cruise control while traveling on expressways and other major roadways. If the Distronic distance sensor detects a slower moving vehicle directly ahead, your vehicle speed will be reduced so that you follow that vehicle at your preset following distance. If there is no vehicle directly ahead of you, Distronic will function in the same way as standard cruise control ( page 257). i The set speed value is decreased in 5 mph (Canada: 10 km/h) increments each time you press the cruise control lever down past the resistance point. G Briefly press the cruise control lever down past the resistance point in direction of arrow 2. Release the cruise control lever. The vehicle set speed decreases in increments of 5 mph (Canada: 10 km/h). The set speed stored in memory should only be set again if prevailing road conditions 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. Briefly pull the cruise control lever in direction of arrow 4 ( page 258). The cruise control resumes to the last set speed or, if no speed is stored, it will set and store the current speed. Remove your foot from the accelerator pedal. The last set speed appears in the multifunction display for approximately 5 seconds. i The new speed is set and the vehicle will decelerate. Keep in mind that it may take a brief moment until the vehicle has reached the set speed. 262