When the Kuga PHEV is in EV Auto mode, it provides an automatic use of high voltage battery power during the drive, staying in electric mode whenever possible and only running the engine when needed.
Even after battery is depleted, whilst driving, the Kuga PHEV will basically become a Full Hybrid Electrified Vehicle, which can automatically recharge itself through regenerative braking or deceleration. This will deliver small amounts of additional charge to the battery when you next need it.
“When operating in EV auto mode, the vehicle continues to recoup energy during deceleration/braking events and stores this as electrical energy in the high voltage battery. This electrical energy is then used to drive the vehicle either without the engine running, or used in conjunction with the engine to drive the vehicle for optimal efficiency. Any excess energy generated by the engine running is stored in the battery for later use.”