Mercedes-Benz

Operation of the ECO start/stop function

The ECO start/stop function is available only in the drive programs and as well as and (depending on the setting).

If all vehicle-related conditions for an automatic engine stop are met, the engine is switched off automatically:

you brake the vehicle to a standstill in transmission position or .
you activate the HOLD function or engage transmission position .

If the system detects an intelligent stop inhibitor, e.g. a stop sign, the engine will not stop.

If you activate the HOLD function or engage the park position , the engine can be switched off in spite of an intelligent stop inhibitor.

In transmission position , the engine is not switched off automatically even when the HOLD function is switched on.

The engine is restarted automatically if:

you engage transmission position or .
you depress the accelerator pedal.
an automatic engine start is required by the vehicle.

ECO start/stop function symbols in the multifunction display:

the symbol (green) appears when the vehicle is at a standstill: the engine was switched off by the ECO start/stop function.
the symbol (yellow) appears when the vehicle is at a standstill: not all vehicle conditions for an engine stop have been met.
neither the symbol nor appears when the vehicle is at a standstill: an intelligent stop inhibitor was detected, e.g. a stop sign.

If the engine was switched off by the ECO start/stop function and you leave the vehicle, a warning tone sounds and the engine is not restarted. In addition, the display 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 switched off after three minutes.