2006 Mercedes SLK-Class Owner's Manual - Page 263

Controls in detail Driving systems i On uphill or downhill 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 with braking from the vehicle's braking system. In addition, on longer downhill grades the automatic transmission* will automatically downshift. i Vehicles with manual transmission: If you depress the clutch pedal when shifting into another gear, the engine speed may increase. Drive with sufficient engine speed. Shift gears in a timely manner. If possible, do not shift down more than one gear. Canceling cruise control There are several ways to cancel the cruise control: Step on the brake pedal. The cruise control is canceled. The last speed set is stored for later use. or Briefly push the cruise control lever in direction of arrow 3 ( page 261). The cruise control is canceled. The last speed set is stored for later use. i The last stored speed is canceled when you turn off the engine. 262