Operation of the ECO start/stop function
WARNING Risk of accident and injury due to automatic engine starting
If the engine was switched off automatically and you then get out, it started again automatically. The vehicle could pull away.
Before leaving the vehicle,always switch off the ignition and secure the vehicle against rolling away.
When the ECO start/stop function is operational and all vehicle conditions have been met, it switches the engine off automatically if the vehicle is slowed to a stop. All vehicle systems remain active. When pulling away again, it starts the engine automatically. The ECO start/stop function thereby helps you to reduce the fuel consumption of your vehicle. The ECO start/stop function is automatically activated each time you start the engine with the ignition key. You can manually activate/deactivate the ECO start/stop function if necessary More.
Displaying the ECO start/stop function in the instrument cluster:
: the ECO start/stop function operational. 
: not all on vehicle conditions for an automatic engine stop are met.
Depending on the engine, the symbol first appears during the automatic engine stop or during the journey.
The engine is switched off automatically if the following conditions are met:
vehicles with manual transmission: you decelerate the vehicle to a lower speed, then engage neutral
and then release the clutch pedal. vehicles with automatic transmission: you stop the vehicle in transmission position
or . all on vehicle conditions for automatic engine stop are met.
When stationary, the symbol appears in the multifunction display. If all on vehicle conditions are not met, the symbol appears in the multifunction display.
The engine restarts automatically in the following cases:
vehicles with manual transmission: you depress the clutch pedal.
vehicles with manual transmission: you engage reverse gear
. vehicles with automatic transmission: you release the brake pedal in transmission position
and with the HOLD function deactivated. vehicles with automatic transmission: you shift out of transmission position
. vehicles with automatic transmission: you select transmission position
or . you depress the accelerator pedal.
an on vehicle automatic engine start is required.
If the engine was switched off by the ECO start/stop function and you leave the vehicle, a warning tone sounds. In addition, the message Vehicle is operational Switch off ignition before exiting appears in the multifunction display. If you do not switch off the ignition, the ignition is automatically deactivated after one minute.