2007 Mercedes GL-Class Owner's Manual - Page 277

Controls in detail Driving systems i Whenever DSR is switched on, DSR will use the programmed default speed to regulate the vehicle's speed. The default speed programmed at the factory is 4 mph (Canada: 6 km/h). The default speed can be reprogrammed using the control system ( page 186). The next time DSR is switched on, DSR will use the newly programmed default speed to regulate the vehicle's speed. Once DSR is switched on, you can adjust the set speed using the cruise control lever ( page 267). Keep in mind that adjusting the set speed using the cruise control lever with DSR switched on will not change the programmed default speed. If DSR is switched off and then switched on again, DSR will use the programmed default speed. Depending on the road surface and level of downhill grade, the DSR may not be able to maintain the set speed. To maintain the set speed, apply the brakes if necessary. Switching the Downhill Speed Regulation on/off The switch is located on the upper part of the center console. Vehicles with enhanced off-road package* 1 DSR on/off 2 Indicator lamp Vehicles without enhanced off-road package* 1 DSR on/off 2 Indicator lamp 276