Hybrid Vehicle, Operating

Hybrid Vehicle, Operating

Refer to the Owner's Manual.

Stationary

With or Without the Combustion Engine Running

When the vehicle is stationary, the engine turns off automatically under normal conditions. However, the engine does not shut off if the battery charge or the coolant temperature is too low.

Electric Motor, Driving

Starting Off and Driving With a Low Load

At this point, the engine is switched off and the Electro-drive drive motor (V141) , which is powered by the Hybrid battery (A38) , is driving the vehicle. This prevents the engine from working inefficiently. If the battery charge is below a specific value, the engine will start in order to charge the hybrid battery.

Driving Electrically (E-Driving)

"Driving electrically" means driving using the Electro-drive drive motor (V141) for as long as possible. The following can influence this:

• Battery charge (state of charge (SOC))

• Speed

• Battery temperature

• Battery current capacity

Using the Extended electric driving mode button (E709) in the center console switches to the E-drive pedal characteristic map. A message in the instrument cluster informs the driver if it is not possible to drive using the Electro-drive drive motor (V141).

Driving with the electro-drive drive motor will deactivated when at least on of the following conditions is met:

• The ignition is off

• The Extended electric driving mode button (E709) in the center console has been pressed twice

• The selector lever is in S.

• The selector lever is moved into the tiptronic gate

• The speed is too high (above 60 km/h)

Push the extended electrical driving mode button to re-activate.

Driving the Combustion Engine and Electric Motor

Normal Driving

In "normal operation" the combustion engine drives the vehicle. The Electro-drive drive motor (V141) works as a generator in that it charges the Hybrid battery (A38) and provides power to the 12 volt vehicle electrical system. If the hybrid battery is charged sufficiently, the electro-drive drive motor can be switched on to drive the vehicle (boost) if necessary.

Full Acceleration (Boost)

The vehicle is driven by both the combustion engine and the electro-drive drive motor at full acceleration. This occurs automatically under the following conditions:

• Kick-down in D

• Pressing the accelerator pedal all the way down when the selector lever position is in S

• Pressing the accelerator pedal all the way down when the selector lever is in the tiptronic gate

Decelerating or Braking

Depending on the brake pedal travel, the Electro-drive drive motor (V141) and/or the brake pedal slows down the vehicle. Only the electro-drive drive motor slows down the vehicle when the brake pedal is in its "idle" position. The wheels drive the electro-drive drive motor, which acts as a generator in this case and captures the energy. The hybrid battery stores this recovered energy and uses it again later. If the brake "idle position" is exceeded, then both the electro-drive drive motor and the brakes are used to slow down the vehicle.

Regenerating

Regenerating means the energy from the moving wheels is recovered and regenerated into electrical energy. The recovered energy is used to brake the vehicle. Electric current is produced by the Electro-drive drive motor (V141) working as a generator and this electricity is stored in the hybrid battery.

If the hybrid battery cannot store any more energy after a long recovery, the combustion engine starts and slows down the vehicle.