If you’re looking to buy a new BMW or a Mini, take note. There’s an iOS 4 feature you’ve probably never heard of that you’re going to love.

Car manufacturer BMW has announced that it will be supporting iPod Out in iOS 4. What’s that? You say. Hidden among the many exciting features in Apple’s latest mobile operating system, the relatively obscure iPod Out is a way for iPhone and iPod models to show the iPod interface on a connected display, in this situation, the dashboard of a car.

While many docking stations and other accessories offer this facility already, this is an Apple-endorsed way of showing and controlling the classic iPod screen and album artwork on an external device and should translate very nicely to in-car entertainment. In the case of BMW, the in-built “infotainment” systems will allow control and playback of a connected device through the car’s existing controls and will even allow access to and creation of Genius and custom playlists.

BMW said of its iPod Out support “Future vehicles equipped with this technology will be able to adapt more quickly to the software lifecycles of iPod touch and iPhone”, basically taking the pressure off them to remain compatible with Apple’s mobile devices as they are updated.

BMW refers to “future” vehicles in its press release so existing owners may miss out on this upgrade, however iPod and iPhone owners in the market for a new car should certainly bear a BMW or Mini in mind when on the forecourt.