Alfa Romeo Giulietta Owner's Handbook Manual page 25

3 - air distribution knob
Air flow to the windscreen and front side window diffusers to demist/defrost them.
Air flow to the front and rear footwell diffusers. This air distribution allows the passenger compartment to be warmed up quickly.
Air flow distribution between front and rear diffusers, centre/side dashboard diffusers, rear diffuser and windscreen and front
side window demisting/defrosting diffusers.
Air flow to central/side dashboard diffusers (passenger's body).
4 - air recirculation on/off button
5 - heated rear window on/off button;
6 - climate control compressor on/off button;
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