Aircon isn't a magic button that allows a car with a cold engine to produce heat.
It will assist in getting the engine up to temperature marginally quicker than by running without it (by placing a greater load on the engine, hence it will have to work harder, therefore heat up quicker) but the heat itself comes from the engine being up to temperature.
Gone but not forgotten:
325i M Sport (E92), Black Sapphire, Coral Red Dakota, 19" 225's, Seat Heating, 6FL and de-badge
Replaced by 6.2 litres of AMG powered C class.