How does the heat pump work in an Audi e-Tron?

I've heard that the Audi e-Tron has a heat pump for more efficient climate control. How does it work and what benefits does it offer?

The heat pump in the Audi e-Tron uses waste heat from the battery and electrical components to warm or cool the cabin instead of relying solely on the HVAC system. This reduces energy consumption and extends the vehicle's range.

In colder climates, the heat pump can also pre-condition the battery by warming it up before driving, further optimizing the battery's performance and range.

To use the heat pump, simply select the 'Efficiency' driving mode on the Audi e-Tron. This will prioritize the use of the heat pump and other energy-saving features.