I bought the Delock USB cable to charge my iPhone in the car on the one hand via cigarette lighter, on the other hand to connect simultaneously to the USB port of the factory radio to. Thanks to this cable, the iPhone now loads and can be operated still on the radio or via the multifunction steering wheel. Previously you could only listen to music, and it was not loaded. With simultaneous use as Navi a disaster! ;) Now works but everything as it was supposed to from the factory.