The following function is not available in all countries.
ECO Assist is active only in 
More.
ECO Assist analyses data for the vehicle's expected route. This allows the system to optimally adjust the driving style for the route ahead and recuperate. If the system detects an event ahead, it will appear on the multifunction display.
Vehicle in front
Speed limit
Downhill gradient
Junctions and roundabouts
Bends
show the distance to the event ahead as follows: A few segments light up: the event ahead is near.
Many segments light up: the event ahead is further away.
If ECO Assist is active, the "Foot off the accelerator" symbol will appear on the Assistance menu on the multifunction display, on the head-up display and next to the transmission position display.
When the vehicle nears an event, ECO Assist will calculate the optimal speed for minimal energy consumption based on the distance, speed and downhill gradient. The "Foot off the accelerator" symbol will appear on the multifunction display.
If the driver takes their foot off the accelerator pedal in good time, the remaining segments on the display will successively turn green until the event shown is reached. The drivetrain will be set for minimal energy consumption. The vehicle will recuperate autonomously and thus charge the high-voltage battery.
You can also manually increase or reduce the recuperation. However, ECO Assist is available only in the setting More.
If there is no response to the "Foot off the accelerator" prompt , the segments will remain white.
The event will be shown for a short time after it has been passed.
If the event involves a vehicle in front, the symbol will be shown in green as soon as there is a response to the "Foot off the accelerator" prompt .
If the system does not intervene during the event ahead, nothing will be displayed. The system is passive.
ECO Assist can function even more precisely if the route is adhered to when route guidance is active. The basic function is also available without active route guidance. Not all information and traffic situations can be foreseen. The quality depends on the available map data.
ECO Assist is only an aid. The driver is responsible for keeping a safe distance from the vehicle in front, for vehicle speed and for braking in good time. The driver must be ready to brake at all times irrespective of whether the system intervenes.
if there is poor visibility, e.g. due to insufficient illumination of the road, highly variable shade conditions, rain, snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic, direct sunlight or reflections.
if there is dirt on the windscreen in the area of the multifunction camera or the camera is misted up, damaged or obscured.
if traffic signs are hard to discern, e.g. due to dirt, snow or insufficient lighting, or because they are obscured.
If the information on the navigation system's digital map is incorrect or out of date.
If signs are ambiguous, e.g. traffic signs in roadworks or in adjacent lanes.
You can watch an animation on this topic at the following link:
