First of all, hello to everybody as this is my first post here, best wishes for all .... I am from Madrid (Spain) and I have just purchased 1 month ago a Class E 320 CDI Avantgarde with Audio 20 (No navegation), free hands option (386) and more ....

I have purchased from MB Germany an original 6 CD Changer multimedia (MP3, WMA, MPEG ... ) with its kit (without mount instructions); as my original Audio 20 system comes with the single player no MP3 compatible ... I am going to install in the dashboard compartiment (with the elevator door) ...

I was searching the forum, and I have found very valuable information here: https://mercedesforum.com/m_33813/tm.htm

But one thing is not clear still to me is the Fiber Opticos conection, why? because I think in my installation kit the people has duplicate the cables in the box:
I have received 2x A 211 540 99 05 98 cables (the one wonderful described where has to be conected their ends in the upper link - power, wake-up and ground - ; so from here is clear that one cable is spare); but also I have recieved 2x A 211 540 31 32 single Fiber Optic cable (one side with conector, the other side not) and here is where I have the confusion ... I have to use only one single cable between the Audio 20 (HU) & CDC, both FO cables in cascade conection for the MOST, make a double path conection ???

Also I have received like 50 cm of autoadhesive felt band I have no idea where it goes

Please, any help (diagrams if posible) will be appreciated as I would like to have all clear before dismount the desk and try to install the CDC.

Best Regards from Spain