CD Changer install C-Class W203 ( 2003 C 240 4Matic )

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New Member
Mar 28, 2020
C240-Class 2003
I really need your help because I tried with many forums and Youtibe there nothing that could help me with this.
I try to install a CD changer into my mercedes ( The car didn'T have one before ). but I can'T find where the oranger fiber cable is going because in my CD Changer the FIber + power cable are cutted but poeple told me that I m supposed to have everything prewired behind my radio , so I Started and here is pictures for I Did...

1. The Orange Fiber cable connected to my radio , where is supposed to be connected ? because i can t find where it goes to connect the other side to the cd changer , unless I need another Fiber cable to Add it as an extension


2. I tried to follow to orange wire to see where it goes but couldn'T , is it normal ? do you think it s already connected somewhere Or I can just pull it out and connect it to the cd changer


3. I couldn't find where the power cable has to be connected behind the radio what do you think


Thanks a lot

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no answer from anyone .. :(:(:(
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Thanks Alfie :

I do not know why I should Need the first wire kit that you ve sent to me since in the back of my radio I Already have the orange fiber cable connected to the radio ( see 1 st picture in my Post ); so I beleive That I Need an extension like this :
Brand New CD Changer Wiring Harness Genuine Mercedes W203/C209 - A2035403308 | eBay

For the Power cable I have no idea where is has to be connected ? is it from the CD changer to the back of the radio ? if so , should I Just unwrap the Power cables in the back of the radio and make an extension to the CD Changer ?

You need the fibre extension because the fibre is a ring and you need to add a device into that ring.

The power/wake up loom is needed as your wires have all been cut. We send fitting instructions with the loom.
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can someone help please ?
Finally I Found the Power cable under the carpet of the passenger seat
, so I Am at 50% of the problem solved , Thanks 100000000 times .

for the Fiber optical cables, I Open the trunk compartiment and I Found 3 Orange fiber cables that are not plugued anywhere ( see pictures ). please tell me which one I can use to connect directly to the CDC. ( when you see the pictures, please tell me also where the Audio Amplifier is located )



1st pic is the Fibre Optic cable
2nd is a Parallel port (not sure what it connects to).
3rd is the aerial.
If you ever get fed up with throwing money at legacy tech then I can recommend swapping it for an Android unit which will give you not only CD playback but also mp3 on CD or micro SD card, streaming from Spotify etc or from your mobile phone, up to date navigation, reversing cam etc.

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