This media interface harness was taken from a 2012 Mercedes C Class (C63) and includes all the wiring from the interface connector backwards, including the fibre optic cable, wiring harness and fakra plug. I believe this harness is also the same in the E class, but you would have to confirm this via Mercedes with the part number below.
The part number for this item is A2048205015 and it's a part in full working order. I purchased it as a spare when I was having problems with my existing media interface and wanted a spare to try whilst diagnosing my problem. In the end, the existing harness in my car was fine, so this wasn't used.
This part will fit most Mercedes C Class' from 2010 to 2015 where the media interface plug is in the centre armrest rather than the glovebox. It may also fit older models too (from 2008). Please ask if you have any questions. Item will be dispatched within 2 days via either Hermes or Royal Mail.