Silence: the typical stationary noise. If, for example, you stop at traffic lights with your foot on the brake pedal, the Auto start/stop function will automatically stop the engine. This fuel saving system restarts the engine as soon as you release the brakes.
A key advantage is that there is no need for you to change your driving habits. You can simply carry on as normal. All audio and communication systems remain switched on and the climate control continues to maintain your selected temperature, despite the engine being switched off. The engine restarts if more power or extra cooling output is required.
On all models, except the Panamera S Hybrid, the Auto start/stop function can be activated and deactivated using a separate button. The function may remain inactive under particular circumstances, e.g. very high outside temperatures, on extreme uphill gradients, or if battery charge is low.