Are you sure you’re not getting confused with the feature that allows you to cool/vent the car in hot weather.
You can pre program the fans to come on and move air around the cabin, can’t see how it can warm the interior without an auxiliary heater or starting the engine, which would be illegal in the UK
There is also a “residual heater” function, which you can use to keep the cabin warm after a run, without starting the engine
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