I just bought this unit and trying to figure out how to wire it to my existing Harman Kardon system. I'm fine with bypassing the fiber optics to run the wires from the front to the back amplifier, just trying to find the correct cables that will plug into my wiring harness that came with my unit.
This is the unit and cables that came with it.
If anyone can show me a guide how to do this or tell me what to buy, that would be great.
This is far from trivial as you need to do one of two things
a) Put in the NAV-TV box that will put the audio on the fibre optics (I haven't checked if they do one for W212 though)
b) Replace the HK amp with a multi-channel amp fed from the 5 output channels (i.e including subwoofers) and then decide what you want to do with the centre channnel and any additional surround channels (you could just ignore them, or use amp in the head unit to drive them and set the gains on the new amp so you are happy with the balance/sound etc)
In the PIC above, 14 is meant to connect the audio output (7,8) to an analogue amplifier on the quadlock (item 10) 12 pin sub-connector. However Mercedes do not use analogue amplifiers on the quadlock - so that is weird.
Some of the chinese head unit suppliers (such as Dynavin) have solutions like the NAV-TV box but at a sensible price as the software than runs it is done in the Dynavin
This is a MASSIVE undertaking, as most of the interior trim pieces (to access the cable loom channel) will have to be removed to do the job correctly. Hopefully your aftermarket deck came with ALL of the required connector/plug adapters to be able to connect to the factory multi-purpose (XM, GPS, Cellular) roof antenna. If not, you will either have to purchase these or "Frankenstein" a suitable cable/connector. I'm not saying it can't be done, but I am saying that it's pretty much an uphill struggle through the entire install. Good luck!
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
