hello forumgemeinde. I hope you can help me here. I have a w220 bj 99 with command and would like to retrofit a cd changer, installation in the case room. I already got the matching changer and the associated cables. now I just need to know how to install the cable and whether I still have to unlock the changer or something? or does it work immediately when it is connected? someone may have a drawing where you can see how the cables from we rk are installed or a good installation instructions? would be very grateful mfg maxim