2009 Mercedes SL-Class Owner's Manual - Page 147

Controls in detail Driving systems in tire traction can result in wheel spin and loss of control. RDeactivate Rwhen the automatic transmission is in park the cruise control when driv- position P, reverse gear R, or neutral position N Rthe ESP® is switched off or has switched off ing in fog. The "Resume" function should only be operated if the driver is fully aware of the previously set speed and wishes to resume this particular preset speed. due to a malfunction The vehicle speed displayed in the speedometer can briefly vary from the speed setting for the cruise control system. 1 Setting current or higher speed 2 Setting current or lower speed 3 Canceling the cruise control 4 Activating the cruise control or resuming G Warning! The cruise control brakes automatically so that the set speed is not exceeded. Keep in mind that the cruise control is a convenience system designed to assist the driver during vehicle operation. The driver is and must always remain responsible for the vehicle's speed and for safe brake operation. Setting current speed X X 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. Remove your foot from the accelerator pedal. to last set speed Activating cruise control You can activate the cruise control at vehicle speeds above 20 mph (30 km/h). You cannot activate the cruise control: Rwhen Rwhen X you brake you have engaged the parking brake i On uphill grades, the cruise control may not be able to maintain the set speed. Once the grade eases, the set speed will be resumed. On downhill grades, the cruise control maintains the set speed by braking with the vehicle's brake system. In addition, on longer downhill grades the automatic transmission will automatically downshift. Z 145