billr979

The previous owner has cut out the cd changer and installed Fosgate amp to replace the Bose amp:-(....Can anyone point me in the right direction on getting it as close to "factory" as i can. Thank you in advance.

PhazonPhobe

See...I'd actually like to do the opposite and upgrade my Bose system to a more modern, more powerful system. But I've heard it's a bear to get into those Bose systems.

seven_out

I too would be looking to upgrade back to the original factory system. You should be able to find the audio components you need priced reasonably on eBay.

The schematic for the original audio system is attached along with a legend.

billr979

Can u tell me which colors are to the Subwoofer i appreciate this greatly.Thx in advance

madmouse28

The sound system is fiber optic and will be a very big task to put back to original. I would consider leaving it as is unless it is no working correctly , someone paid a lot to up grade the system.

FlyingScot41

The wiring and fiberoptics are not that difficult to replace but it is a lot of work. I have the same problem on my W220. Some idiot cut the wiring harness and the fiberoptic cables in the boot. I have checked with my Mercedes main dealer and the full harness from the Bose Amp to the Command is available and cost around £350 or about $560. Most of the harness is under the floor so the seats have to come out. I managed to find a complete fiberoptic harness on eBay for about £100 ($160 ish). Once you have the harness it is a matter of being methodical. Free off the harness but don't disconnect anything lay the new harness alongside the old and make the connections as you disconnect. Do the same for the fiberoptic system. Remember that the Command system will need to have a STAR visit to get the Bose amp recognised by the system. Mercedes main dealer recommended that I find the harness identification number for the harness fitted to my car and they would order in the harness from that number, same for the fiberoptic harness. The fiberoptic harness from Mercedes is about £121 ($195 ish) so buying new is not much different to buying from eBay! The Bose system is by far the best system for the car because it was designed and tuned to the cabin acoustics for the W220. Yes it may not be as powerful as a more modern system but the sound quality is superb.

madmouse28

I attached a schematic hope this helps and good luck.

hegar817

Anyone know where I can get a schematic for a 2003 model?
Thanks

vmystikilv

If the fiber optic line itself has been cut, chalk the system up as a lost....

hegar817

Reason I ask is because my fan radio stays on at all times even with the key removed. Radio also can be powered on if the power button is pressed. I think the radio fan may be the culprit to why my battery dies every day. Can any of yalls radios be powered ON with the key off? Wonder if it is the radio itself or a wiring issue.

renault12ts

Yes, it is a feature, all COMAND systems can be powered on with the key out.

Mr. S500

my fan doesnt stay on it might be the fan on your ac control module

Fried Chicken

I get now sound from the speakers when the car is cold... I don't have an explanation for this, on the head unit everything appears to work as it should, although sometimes the mute icon won't appear when pressed. I'm thinking bad caps, but maybe it's as simple as a bad fiber optic connection to the amplifier?

tusabes

amp in trunk often gets water damage get a used in eBay

Fried Chicken

Already done this like twice. Have one sitting here, considering replacing the caps