How does the Audi A2's heat recovery system work in cold weather?

I've noticed that my Audi A2 takes longer to warm up and doesn't heat as well in colder temperatures. How does the heat recovery system in the Audi A2 work and does it still function efficiently in lower temperatures?

The heat recovery system in the Audi A2 uses the hot exhaust gases to warm up the engine faster, which in turn heats up the cabin. However, in colder temperatures, the system may not be as effective as the exhaust gases are not as hot. Solution: Consider investing in a block heater for colder climates.