Finished Radio Install
12-02-2012, 01:47 PM
#26
MBWorld Fanatic!
Wired differently
They're probably wired differently because they are different COMAND units. When the W211 E-Class was first introduced (late 2002 for the 2003 model year), it came with a new COMAND. That was COMAND APS and it used a MOST based telecommunications protocol rather than D2B (for those in telecom, both of these look a lot like token-ring, which explains a lot of things). The main advantage to the MOST system is it's faster (for video). The W209 CLK was introduced along with the W211 for the 2003 model year, but the W209 CLK continued using the old COMAND until late 2004, when the face lifted 2005 model was introduced.
There are over 50 different COMAND units. They use different part numbers and heaven help you if you try to get something like a S-Class COMAND to work in a CLK. For openers, the nav won't work. If it's a European S-Class COMAND, teleaid and the weather band won't work either. A lot of the AM stations won't come in either.
Why two amps?
Having not chased all the wiring, I’m going to guess the COMAND’s internal amp powers select speakers. The external amp would then power the others.
They're probably wired differently because they are different COMAND units. When the W211 E-Class was first introduced (late 2002 for the 2003 model year), it came with a new COMAND. That was COMAND APS and it used a MOST based telecommunications protocol rather than D2B (for those in telecom, both of these look a lot like token-ring, which explains a lot of things). The main advantage to the MOST system is it's faster (for video). The W209 CLK was introduced along with the W211 for the 2003 model year, but the W209 CLK continued using the old COMAND until late 2004, when the face lifted 2005 model was introduced.
There are over 50 different COMAND units. They use different part numbers and heaven help you if you try to get something like a S-Class COMAND to work in a CLK. For openers, the nav won't work. If it's a European S-Class COMAND, teleaid and the weather band won't work either. A lot of the AM stations won't come in either.
Why two amps?
Having not chased all the wiring, I’m going to guess the COMAND’s internal amp powers select speakers. The external amp would then power the others.
So a huge pain in the *** in other words.
My install is done. Everything works as expected. 1 amp is running the center channel and the other is running the rest of the speakers and subwoofer.
For anyone else looking to install the dynavin mc2000 in a car that has Bose: the connector is plug and play except for the 2 CAN wires. They need to be tapped into. The main part of the job is running all the new wires etc.
