See also:

Important safety notes
Cruise control maintains a constant road speed for you. It brakes automatically in order to avoid exceeding the set speed. On long and steep downhill gradients, especially if the vehicle is la ...

Center console, lower section - AMG vehicles
  ...

Storing and maintaining the current speed
You can store the current speed if you are driving faster than 20 mph (30 km/h). Accelerate the vehicle to the desired speed. Briefly press the cruise control lever up 1 or down 2. Remove ...