Hello, I have a question about the Seat Altea XL and whether it is true that the AHK-preparation is already installed from the factory, so that it doesn’t have to be installed extra, but only the coupling has to be mounted and the E-set has to be plugged into the control unit in the trunk. Is this true? Or does the data bus have to be placed up to the instrument panel at the XL? I would also like to know if the recordings for the coupling are already pre-drilled, or if there is already a thread, where the coupling is attached and whether there is any guidance in the net for it? (have already Googled but found nothing) Thank you for your help