Where is the Voice Control Module on a X164 (2008 GL320)




I seem to have a small issue getting the Voice Control to work.
The activation menu does not show up in the Command system settings display and I get no beep when pressing the steering wheel buttons.
The car is supposed to have Voice command. It is on the Datasheet and the instruction booklet is in with the owners manual.
I am wondering if the module died or maybe the connector came loose.
The previous owner said he never used it.
If I need a new module, does anyone know the difference between;
211 820 62 85
and
211 820 30 85




OK, found the unit (I think).
It is under the back seat with the other audio electronics.
From what I can see without removing anything, it seems to be mounded under an open bracket (Maybe for the rear seat heater controller, which my car does not have) and partially under the Sirius radio module.
I am still trying to verify if the VCS modules with different part numbers are interchangeable.
I have found several references that show multiple numbers for the part.
2038208285; 2118208085; 2118703626; 2408201585
Also, does anyone know if the part needs to be coded to the car, or if I get a working module from ebay is it likely to be plug and play?



