urgent cd changer help reqd!

[Yosser]

1998 w202 estate, audio 10 cassette head unit, MB 6 disc changer in boot (OE retrofit)

I've got a bit of a problem with my CD changer.

Everything used to be ok, I then installed a different head unit which wasn't connected to the changer. This worked ok too.

I have now re-installed the original audio10 unit as I have sold the car (hence the panic).

When the CD button is pressed, the display says No CD. There is power at the changer, as the eject function works. I just can't get the changer to function.
The battery was disconnected for a wee while, but I've had it disconnected in the past with no ill effect.

Any ideas please??

I'm in a bit of a flap as the car is meant to be getting handed over in the next day or two.

 

[richard]

Sounds like you didnt plug the fibre optic cable back into the head unit properly (or the fibre optic into the CD changer).

There should have been
aerial connector
A connector 10 pin
B connector 8 pin, most often physically part of the A connector
C connector 8 or 10 pin (can't remember)
Fibre optic connector (2 orange fibres) - be careful with the fibres you can fracture them internally

A gives power to the unit (etc) B is speakers C sends power to the CD changer (and wakeup for fibre optics) Fibre connector is for sound/control of CD changer (and integrated phone / bose / voice recognition if you have them)

Cheers
Richard

 

[Yosser]

Problem Solved!

Thanks for the response Richard.

After a bit of searching on the forums, and the wider net, I have managed to get it to work.

There is no C connector in the car. The changer was a retrofit (by MB) and the only extra connectors were the optical one and the one I missed ;

one wire connected to pin4 of the C connector on the head unit.

All works ok now.


Was able to confirm pins on this site;

http://www.hanshehl.de/multimedia6.htm

Thanks again.

 

[richard]

one wire connected to pin4 of the C connector on the head unit.

As you found, that is the wakeup signal - which tells the CD changer to wake-up its fibre optics when head unit is on .. (otherwise CD would drain battery)
Being a retrofit I guess they wired the power direct to a fuse somewhere rather than taking CD changer power from the C connector

Glad its sorted !

What have you replaced the car with ??

Cheers
Richard

 

[Yosser]

What have you replaced the car with ??

Unfortunately, it's going to be replaced by a Fiat Scudo van.....

My wife is about to open a florist shop so we needed a van. I was chatting to one of my neighbours and he offered to buy the Merc, so I took him up on it.

I've taken a bit of a loss, but thats life.

I'm pretty sure I'll make another foray into MB ownership as soon as possible.

Probably another C class estate, probably not a 180. Fancy something with either more go for the mpg, or just more mpg. i.e C240 or maybe C250/220D.

Thanks again.