2006 Mercedes SL-Class Owner's Manual - Page 214

Controls in detail Driving systems Briefly lift or depress the cruise control lever. The current speed is set. Remove your foot from the accelerator pedal. Setting a higher speed Briefly tip the cruise control in direction of arrow 1 ( page 212) to increase the vehicle speed in increments of 5 mph (Canada: 10 km/h). The new speed is set. Setting a lower speed Briefly tip the cruise control in direction of arrow 2 ( page 212) to decrease the vehicle speed in increments of 5 mph (Canada: 10 km/h). The new speed is set. i If you do not take your foot off of the accelerator completely, the following message will appear in the speedometer display field: DTR override. 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. 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 tip the cruise control lever in direction of arrow 4 ( page 212). 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. 213