Just noticed this today on the way to work. I had the lights on and switched to D when a bloke in a VW Polo next to me gave 'that look' at a red light. Anyway, when I pushed the switch for D mode the dashboard lights dimmed for a second then went back to normal. Has anyone else noticed this? Is it supposed to do this or is this a potential fault? I never noticed this in my MiTo, so maybe it's something in the Giulietta.