fyllomirea

hello i have a 2000 s500. my radio doesnt work, no sound, voice commands, navigation,the phone, and even the cd changer doesnt work. the screen is on but nothing, every now and then the sound comes back on and as soon as i turn off the car, back to no sound. also i hear a beeping sound at least 5 times a day.i have disconnected the negative and nothing, i havent tried anything with the cd changer yet. and dont know what to do with the phone, if there is a hard reset or something. i would greatly appriciate all suggestions, to helping me solve the problem with the radio. thanks

please help.

vmystikilv

its not that difficult , don't worry. You need to go into the diagnostic menu of your radio and find out what unit is bad. For me, it was the telephone adapater. bypassed and everything came back on. Took me maybe 15 minutes to do.. one of your audio units on the driver side trunk is bad...you can also manually do it by just unplugging each device and bypassing. Keep in mind the system is a loop. if you unplug something to test you need to close the loop so the fiber optic signal goes through each piece...


P.S. before you do the hard stuff, check the fuses too.. there is a good section on this in the top sticky where it says s class owners start here..

fyllomirea

ok thanks alot, i will check that, but one more ? how do i bypass a fiber optic cable and can i do it safely with the battery on. and how do i go to the diagnostic menu in the radio and find out the problem. thanks

vmystikilv

its all in the sticky at the top of this forum. you don't need to disconnect the battery. and as far as the fiber optic, I just unplugged it from whichever component and bypassed it with an existing coupler that was already built into the system. there the little black pieces in the orange line, they connect the lights together and can be opened. but you can buy fiber couplers from the dealer for very cheap.




found the link, will let you know everything


http://www.carstereohelp.com/mercedesFiberOptic.htm

fyllomirea

Ok thanks alot perfect, so i can use the same coupler of the cd changer or whichever one doesnt work and bypass it by connecting the loop together. Right? As in the video, thanks for the quick response.

vmystikilv

Correct. Good luck.

fyllomirea

ok, i tried it and all of them blinked only once, with the fiber optic and the component. all but the amp, the amp blinked once but the fiber optic didnt blink at all. does that mean that the amp is gone or i can just bypass the cable and it should work. and the other case is that i live in spain, and these guys are not going to know what im talking about the coupler. and the part number doesnt come up in their system. now i already have two couplers connected on the system, is there any way i can disconnect one of them and connect it to the amp. or if i do that i will have another loose loop and still wont work. i dont know what it means if only blinks once. would greatly appreciate your response. thanks

vmystikilv

its suppose to blink, that's ok, you need to find the component that doesn't blink...... Ok let me explain....


If your testing, lets say the cd changer is bad....


so you pull the first fiber optic harness (orange) of the telephone module, one light lights up, ok move to the next..


Then you look at the voice module connection, you pull it, one lights up, move to the next




then you pull the cd changer fiber optic, one lights up, you move to the next...


then you pull the amp fiber optic, no light lights up, that means the previous unit in the fiber optic line, the CD change,r is bad..




you would then unhook the cd changer and pry open the fiber optic connection and use a coupler to just connect the lines thus bypassing the cd changer...




That's the best way I can explain what to do. Their is also a fuse in the amp so make sure to check that while you have pulled everything out and the one's under the rear passenger seat behind bottom light.

fyllomirea

ok thanks alot for the info. i will explain to you what i did.

i checked all of them as you said and all worked except the amp, i unplugged the fiber cable from the amp, turn on the radio and only the amp blinked once but the cable did not blink. tommorrow i will go to the dealer here in spain to see if they know what im talking about, to get the coupler. my question is that the only way to find out is to bypass the cd changer and hope thats the problem if not its the amp the problem ? thanks again for the help, its greatly appreciated

vmystikilv

if you unplugged the amp and there is no light than its whatever unit is before the amp.
You got this!


Mercedes Benz Fiber Optic Bypass Coupler
Part Number 000-545-33-84

fyllomirea

thanks for all the great advise, tommorrow my couplers are coming in. these guys here dont know too much about fiber optics. i will try all the procedures advised, also yeaturday i looked better at the cables and some of them have the wire stripped, not to the point where its hanging off by just the wire, but just alittle as the skin protection comes off. do you think that could also be a problem and can i just tape it up with electrical tape and hope for the best or does mercedes sell short length fiber cable ? thanks

vmystikilv

First use the coupler and get some music and functions back. Than you can diagnose the broken parts. I would only look at the wires if they are leading to the bad unit.

fyllomirea

hello, i just tried bypassing the cd changer and nothing, i tried every other component and still no sound, is there a chance that i might have to bypass all the extra components to get sound. or is there something else i have to be checking out ? thanks for all your help vmystikilv.

vmystikilv

You said you saw lights until you got to a certain unit . Which unit did you unplug when you saw no lights flash anymore

fyllomirea

on the amp fiber optic the cable doesnt blink, all the other units blink only once though. The first unit i tried to bypass was the cd changer and nothing no sound , then the phone module, and last the voice module and still nothing. tommorrow im going to order 2 more couplers and try to bypass all the units except for the amp to see if this brings back sound. iv'e been riding for almost 2 years with no sound. and i dont really want to go to the dealer cuz they will tell me all the units are bad incluiding the amp. they tried getting me with the air compressor saying that its burnt out. and i really dont trust to many people here in spain to work on a mercedes especially with fiber optics and the car being from the states. do you think its easier just to put in a double din and get the facelift kit for the radio and just go normal and take out the fiber optics.

thanks for your help

vmystikilv

What unit is before the amp, please trace this wire

vmystikilv

You don't need anymore couplers. You can bypass everything with what you have. Just unhook all the fiber optics except the one to the amp. You technically wouldn't even need a coupler if you go this route.

fyllomirea

ok i wil do that right now and get back to you in 15 min thanks

fyllomirea

ok do i unplug the power of the voice module and the phone module and take put the fibers out?

fyllomirea

ok i have the amp fiber optics connected directly to the radio in and radio out fiber optics and still no sound. i disconnected all the other units and still nothing. ?

vmystikilv

Check the fuse in the amp

vmystikilv

You have to have the amp connected. Do not bypass the amp

fyllomirea

yes i checked the fuse, even changed it just in case and i did have the amp connected only going to the radio, all other units were disconnected and still nothing. im getting so frustrated with this car.

wallyp

This is not intended to be insulting - Is the radio display normal and functional? Are you certain that you don't have any radio control set that would kill the sound?

vmystikilv

If everything is bypassed, log into the the diagnostic section of the radio and do a test to see if it sees the amp. Do a search. You have to hold three buttons down to get into the menu.

While your in there do a system reset too