Can anyone help with c/d changer wiring

[steamview]

Hello to all i have a 2005/55 Clk 350 with a audio 20 head unit i am trying to fit a c/d changer which i have purchased,which is the correct part number for the car i have also purchased 2 fibre optic cables and the power loom.In the power loom there are 3 wires 1 brown which is earth 1 with a fuse on the end which I have wired to fuse 20 in the boot as listed on the fuse chart. There is also a blue wire which i dont where it goes,Also there is already 2 fibre optic cables in the back of the head unit there is a space for 2 more but if i look in the back of the head unit it does'nt appear that there is anything for 2 extra cable to connect to any help will be Greatly Appreciated Thankyou Keith

 

[television]

I can see what I have in the morning, you may have to remind me

 

[type49]

Blue wire is "wake-up" signal. Trouble is, I can't remember where you spur into it. it could be in NS sill or even back of radio - poss blue/black wire. As for optics, you will only have two wires for each component, including radio/headset. They are connected in loop form, ie even if you had TV, Navi, phone, lingutronic etc,, you would have an orange optic wire in & then out, onto next component, in & out, to next & so on. Does this make sense???

 

[television]

Blue wire is "wake-up" signal. Trouble is, I can't remember where you spur into it. it could be in NS sill or even back of radio - poss blue/black wire. As for optics, you will only have two wires for each component, including radio/headset. They are connected in loop form, ie even if you had TV, Navi, phone, lingutronic etc,, you would have an orange optic wire in & then out, onto next component, in & out, to next & so on. Does this make sense???

It does to me thanks

 

[steamview]

Blue wire is "wake-up" signal. Trouble is, I can't remember where you spur into it. it could be in NS sill or even back of radio - poss blue/black wire. As for optics, you will only have two wires for each component, including radio/headset. They are connected in loop form, ie even if you had TV, Navi, phone, lingutronic etc,, you would have an orange optic wire in & then out, onto next component, in & out, to next & so on. Does this make sense???

Thanks for all the help now fitted and working perfect. Easy when you know how!