2011 Mercedes R-Class Owner's Manual - Page 182

180 Driving systems If DISTRONIC detects a vehicle in front, segments ; between the speed of the vehicle in front : and stored speed = light up. Do not place your foot under the brake pedal - your foot could become caught. Driving and parking G Warning! DISTRONIC displays in the multifunction display X An intermittent warning sounds and the distance warning lamp · in the instrument cluster is illuminated if the Distronic system calculates that the distance to the vehicle ahead and your vehicle's current speed indicate that the Distronic will not be capable of slowing the vehicle sufficiently to maintain the preset following distance, which creates a danger of a collision. Immediately brake the vehicle to increase your distance to the preceding vehicle. The warning sound is intended as a final caution in which you should intercede with your own braking inputs to avoid a potentially dangerous situation. Do not wait for the operation of the warning signal to intercede with your own braking. This will result in potentially dangerous emergency braking which will not always result in an impact being avoided. Tailgating increases the risk of an accident. Press the V or U button to select the DISTRONIC menu (Y page 201). Display when DISTRONIC is switched off When DISTRONIC is deactivated, you will see the following in the multifunction display: : Vehicle in front, if detected ; Distance indicator, displaying current distance to the vehicle in front = Specified minimum distance to the vehicle in front, adjustable ? Own vehicle G Warning DISTRONIC brakes your vehicle with a maximum deceleration of 13 ft/s2(4 m/s2). This corresponds to approximately 40% of your vehicle's maximum possible braking power. You must apply the brakes yourself to avoid a collision. DISTRONIC brakes the vehicle to restore the set distance to the vehicle in front or to restore the set speed. In this case, the brake pedal is depressed automatically, which can be seen by a movement of the brake pedal. Always keep the driver's footwell clear, including the area under the brake pedal. Objects in this area may impair pedal movement and cause the DISTRONIC braking function to malfunction. Display when DISTRONIC is activated After this time, you will see the following in the multifunction display while DISTRONIC is activated: : DISTRONIC activated ; Stored speed When activating DISTRONIC and when setting the speed, stored speed ; appears for around five seconds. After approximately five seconds, current saved speed ; is shown in the status indicator in the multifunction display DTR XXX Miles.