2008 Mercedes SL-Class Owner's Manual - Page 225

Controls in detail Driving systems Setting the current speed Accelerate or decelerate to the desired speed. Briefly lift the cruise control lever in direction of arrow 1 or depress in direction of arrow 2 ( page 223). Distronic is activated and the current speed is set. The currently set speed appears in the status indicator of the multifunction display: USA only: DTR XXX MPH i If you do not take your foot off of the accelerator but continue to accelerate past the set speed, the following message will appear in the multifunction display: DTR Passive. The distance to slower moving vehicles in front of you will not be set. Your vehicle speed will then be determined only by the accelerator pedal position. Setting a lower speed Briefly tip the cruise control lever in direction of arrow 2 ( page 223) to decrease the vehicle speed in increments of 5 mph (Canada: 10 km/h). The new speed is set. Setting a higher speed Briefly tip the cruise control lever in direction of arrow 1 ( page 223) to increase the vehicle speed in increments of 5 mph (Canada: 10 km/h). The new speed is set. i When you use the cruise control lever to decelerate, the brakes will be applied to support deceleration. In addition, the transmission will automatically downshift on long downhill grades. Fine adjustment in 1 mph (Canada: 1 km/h) increments Faster Briefly pull the cruise control lever in direction of arrow 4 ( page 223). Canada only: DTR XXX Km/h Remove your foot from the accelerator pedal. i Depressing the accelerator pedal does not deactivate Distronic. After brief acceleration (e.g. for passing), the cruise control will resume the last speed set. 224