Nissan Qashqai e-POWER 2024 Owners Manual
2.10.3. ECO mode
This mode assists the driver’s ECO-driving.
Acceleration profile is optimised for efficient driving.
Engine running logic is fully optimised for economy.
Optimum regenerative braking profile for cruising or city driving can be selected by shifting between D and B mode.

Selecting the ECO mode will not necessarily improve fuel economy as many driving factors influence its effectiveness.
Owners Manual