W203 D2B wakeup

[miro]

I noticed the other day that my car doesnt have a "D2B wakeup".

Is it only for the phone ?

Is it a ring that follows the optical loop or is it a single connection?

Would anyone like to explain to me where it starts and ends ?

 

[sym]

Don't know about W203, but its for the CD Changer, and Phone on the W210 / anything with COMAND, and its all devices linked in parallel (not optical - one wire separate from the optical loop) , terminating at the head unit / comand end.

 

[miro]

Don't know about W203, but its for the CD Changer, and Phone on the W210 / anything with COMAND, and its all devices linked in parallel (not optical - one wire separate from the optical loop) , terminating at the head unit / comand end.

So then, if you have
- BOSE amp (optical link to head end)
- Phone
- TV tuner
- CD changer

All these are residing on the optical D2B bus, then they all have wakeup D2B signals returning to the COMAND ?

Did I interpret that correctly ?

Does one have a special trick for terminating all these cables in retrofits ?

 

[sym]

TV Tuner has no optical output - is wired direct into the C1 & C2 connector on COMAND.

Bose has optical output - yes - so Bose, Phone, and Changer would be wired in a loop with D2B optical cables, and in parrallel with D2B wakeup wire.

D2B optical splice adapters used to make the loop - very simple when you know how, and well documented on here.

S.

 

[miro]

TV Tuner has no optical output - is wired direct into the C1 & C2 connector on COMAND.

Bose has optical output - yes - so Bose, Phone, and Changer would be wired in a loop with D2B optical cables, and in parrallel with D2B wakeup wire.

D2B optical splice adapters used to make the loop - very simple when you know how, and well documented on here.

S.

Thanks, that clears it up nicely, what is the OEM method for managing the D2B wakeup wires.

 

[sym]

OEM method, acccording the wiring diagram that I have for a W210 is to solder the wire for additional devices (Phone etc.) to any point along the main wire running to the CD Changer - only one wire goes into the Head Unit.

 

[miro]

OEM method, acccording the wiring diagram that I have for a W210 is to solder the wire for additional devices (Phone etc.) to any point along the main wire running to the CD Changer - only one wire goes into the Head Unit.

In that case I would rather use an IDC connector that joins securely without soldering. In AU we have KRONE connectors for the job. Only costs $5 and does up to 6 connections of wires in several diameters.

I also found out that voice recognition is in the D2B optical ring.

 

[sym]

Well I guess any form of secure connection is fine . . . however soldering worked OK for me !!

S.

 

[MBenzNL]

All components on the D2B ring are connected to the wake up (C2 pin 10):
- phone
- CD changer
- voice recognition
- teleaid
- bose soundsystem

The wake up wiring goes from C2 pos 10 to the pass side A-pillar were it is connected to a central connector in which all other wake up leads get connected as well...all standard - factory mercedes - no soldering involved.

greetingz,