you brake the vehicle to a standstill in transmission position
or 
. all conditions for an automatic engine stop are met.
vehicles with 48 V on-board electrical system (EQ Boost technology): you depress the brake pedal when driving at speeds below 20 km/h.
vehicles with a 48 V on-board electrical system (EQ Boost technology): you engage transmission position
.
The 
symbol appears in the multifunction display when the vehicle is stationary. If not all the vehicle conditions are met, the 
symbol appears in the multifunction display.
you engage transmission position
or 
. you depress the accelerator pedal.
vehicles with 48 V on-board electrical system (EQ Boost technology): you release the brake pedal in transmission position
when the HOLD function is not active and the vehicle is not in drive program 
or 
and the vehicle does not start to move. vehicles with 48 V on-board electrical system (EQ Boost technology): you release the brake pedal, the vehicle is not in Glide mode and it starts to move at a speed above approx. 3 km/h.
vehicles without a 48 V on-board electrical system (without EQ Boost technology): you shift from transmission position
. an automatic engine start is necessary.
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 the ignition before exiting appears in the multifunction display. If you do not switch off the ignition, the ignition is automatically switched off after three minutes.