JohnCL

OK, so today out of the blue I get the N1112 error on my COMAND which means "No data transfer between D2B master and D2B predecessor component possible" and I wanted to check in for guidance. The only thing the system will do is show my map, the CD changer is dead, no audio, etc.

I searched and the only thing that I came up with was a thread where I posted what that error meant. Now I have it to deal with and am not sure which way to go.

TIA

JohnCL

OK, after further investigation the Cd changer magazine will not eject. When I hit the CD button it states no changer installed and it says CD-ROM on drive 0 as my NAV disc is in. Would the CD changer stop the audio? I can still navigate, just no NAV voice.

amdeutsch

Since they are all looped together I can see where a communication break down in the chain could have an effect of the whole.
Can you isolate by taking one piece out of the loop at a time and connect the rest? I.e; take the changer out of the loop and see what happens.

JohnCL

I will have to remove the fiber for the changer correct? Just unplugging will leave an open loop correct? I will attempt this later in the weekend. Somehow I think it is the changer due to the way it is acting. I would think that it should eject the magazine. Hopefully it is not the Bose system that is the problem.

RumbleUK

Hmmm when you first put you key in the ignition does the cd changer eject button light flash? Or do you hear the changer power up at all?

I had a problem where a disc got stuck in the reading position and my head unit kept on saying no cd changer.

Also try cleaning the d2b connection for the changer the and the socket, sometimes dust/debris etc can block the signal.

Aswell, consider if you installed anything recently that might have tangled/squashed one of the d2b wires anywhere on the loop.

JohnCL

I did not watch the light when I put the key in, but I will try once the car gets home. MB replaced the changer back in January, and that is the only thing that has been added to the loop recently.

JohnCL

OK, I am really confused now. When I installed the COMAND I used the harness which gave me the second power cable for the changer. So, I thought that I would start by removing the COMAND and put in my standard cassette in and used the original power cable for the changer. When I changed the power cable the changer responded and I was able to eject the magazine, but when I hit the power on the H/U I get audio for a brief second and then it goes back to silence. On the cassette H/U it also states "NO CHANGER". Even with the changer out of the loop I don't get any sound. I guess I don't see how the changer could be causing all of these weird symptoms. I mean with the changer out completely it does the same. I guess my only other option is the bose amp as I do not have anything else in the loop.

Thoughts anyone?

JohnCL

OK, I have some more info to share. I have the COMAND back in and at first there was no audio and I pulled the power from the changer and put it back and the audio was there. The changer is seen and all is working fine. If I power off the COMAND and power it back on there is no audio and if I go throught the power plug pull and re-insert I get it all back again. So, is it a bad changer or bad COMAND harness??

I am going to remove the C1 from the COMAND and see what happens.

JohnCL

C1 didn't make any difference on the performance. I can always get audio if I remove the changer power and it back. Once I turn the unit off and on again I get the same result of no audio and the cd changer magazine not ejecting.

Only if I had another changer to try!

Oh well, off to the dealer I guess.

RumbleUK

is the blue/black D2B wakeup wire properly seated in C2 pin 4? You might want to follow the wire see if there is any damage to it.

JohnCL

The C2 looked OK, but I will check again to make sure. Just not sure why pulling the CD power and putting it back makes it all work again until it is shut down. I have never seen an issue like this. I will check the C2 gain though, thanks.

JohnCL

I gave this some more thought and remembered that when I used the standard cassette I got the same result and with that I do not even use the C2 connector. I have tried so many thing since last night.

Thanks for your help.

RumbleUK

Sorry, i meant C pin 4 or if you have Comand its C2 pin 10

RumbleUK

Heres some additional info on the D2B system for troubleshooting!

http://www.mercedestechstore.com/pdf...2003-09-04.pdf

JohnCL

Thanks for the information, I will check that out.

ML55CLA45

john did you ever get this fixed? have you tried taking the cd changer out of the loop?

hope you get this squared away!

-carino

JohnCL

Not yet, it is at the shop and they are telling me that it is the video adapter. I don't see how this can be as the video adapter is not on the D2B bus and should not be causing this kind of problem. Even when I put the tape deck back it has the same symptoms and at that point the video adapter is not even connected and it is impossible that it is the issue. I am convinced that it is the changer, but I cannot get them to agree.

MJ50

have u tested COMAND with cd changer disconnected?

JohnCL

I never got to the point of closing the fiber loop with the changer out. I got frustrated and took it in.

JohnCL

Well, the changer was pulled and they are going to try and "fix" it. I am on an aftermarket warranty and they wouldn't replace it.

I pulled the changer fiber plug and put a splice in and it all works as it should and it is not throwing any error codes. Having radio only kind of sucks but it is better than silence I guess.

ML55CLA45

so... comand is working... and everything is working.. just no cd changer?

i never use my cd changer... maybe i should just sell you mine... j/k

hopefully youll get everything fixed and ironed out....

-carino

JohnCL

Yep, everything else works fine. Nav, Aux, Radio, etc.

I don't know how you can go without using your changer! I use mine all the time as the nonsense on the radio really annoys me,

We shall see if they are able to fix the changer.

JohnCL

Well, they fixed the changer and all is OK again. I knew it was that damn changer all along!

The lazy a$$ S/A that I got stuck with at Aristocrat Motors refused to even look at the system due to the fact that I had an A/V adapter installed. Funny this is not even on the fiber network and could in no way cause this problem. Simple diagnostics would have told him this, but that was way too much work I guess. I have had great experiences with 2 S/A's up there (Matt and Todd) but unfortunately I did not get a chance to sit down with them. All the rest that I have dealt with leave alot to be desired.

I even removed the A/V adapter and proved that was not the problem but it still would not be looked at.

So, any of you KC guys that need audio help in the future Santa Fe AutoSound is the place. They got the changer fixed and the turnaround was pretty quick.

ML55CLA45

i had todd as an SA in the past and i wasnt very pleased with him at all... last name start with an H and ends with a T? (H _ _ T) ?

one time on my c240 the temperature therm was reading incorrectly.... he took me out to my car and showed me that the therm was not mounted in the correct place. he told me a rock probably knocked it off and that it was not covered under warranty....... so i took the car to JW and the repaired it under warranty....


later on that year i had the e320 in and when i picked up my car the tow hook cover was missing on the front... he again told me a "rock must have hit it"... that they didnt lose it... and that i would have to pay 50 bucks for a new one shipped from germany... aristocrat then later agreed to pay for a replacement.... and todd said hed call me when it arrives.... guess what, i never heard back from him... a few months later i took the car into JW for something... probably an oil change... told the SA about what had happend... and JW end up replacing the tow cover for me for free....


I like clinton... im actually going to be by aristocrat this weekend for an oil change...

glad you got your audio problems resolved...

where did you get your a/v input at? easy to install?

-carino

JohnCL

I know exactly who you are talking about and he has been great for me. It is funny how things work differently for different people. The problem that I had was with your guy and he was a royal ***! I have had way better service at JW and even that they are under the sam umbrealla now they are still leaps and bounds above Aristocrat. I left Aristocrat for a reason when JW opened and after this experience I remember why.

As far as your tow hook cover, it is BS that a rock hit it and popped it out. Hell, you can hardly do it the correct way with your fingers!

The A/V adapter is really easy as it just integrates into the C1 and C2 connectors.