SET + - turns on cruise control and activates DISTRONIC. The DISTRONIC (distance cruise control) distance can be adjusted using the toggle switch with lines. Press the "RES" button twice to control your speed using road signs. You can also set COMAND so that the restrictions ALWAYS apply when cruise control is engaged. If DISTRONIC is switched on and the distance to the vehicle in front is adjusted automatically, it is active. The DISTRONIC system is passive, if you have it on, drive with it and accelerate briefly. The cruise control function is NOT disabled, but you briefly interfered with its operation while driving. As soon as you take your foot off the accelerator and the cruise control reaches the set speed, the DISTRONIC system is reactivated.