Whilst removing the ashtray to get to the climate control unit, beneath it I noticed that there is a multi plug with a lift off cover and a 20amp fuse ajacent to it.
it`s an obd2 connector for you're diagnostics for the stealer's to rip you when you're up **it creek!! and the other i have heard is for hands free connector!
I have read somewhere that the 20a fuse is for the internal accessories (dealers can remove this on showroom models to stop the battery going flat). The handsfree connector is usually further down the centre console alongside the gear lever 10w (I think) mine was yellow....Dave