Wicked Chili extension cable / Dock Extender for Apple iPhone 4s / 4/3 / iPad 3, 2, 1 / iPod Touch, Nano (19 occupied pole, length: 120 cm) (Accessories)
I use this cable to be able to save me an expensive adapter for the Audi. In the center console I connect the cable and can now charge my iPhone and the phone share the built-in auto antenna thus.