Parts required:
COMAND 2.0 unit specific to your vehicle. I used part number A203 827 4842. This is a 2004 US spec
unit that includes the SAT button for the Satellite radio option now available in some 2004 models. I have
not hooked this up or know much about it. I will report back when I know more. Please note the first three
numbers correspond to my model (203). Make sure you buy a COMAND unit that is specific for your
vehicle if you are doing this in something other than a “C”. The different model numbers (usually) have a
different navigation gyroscope angle adapter depending upon how the unit sits in the dash. The W209
CLK units are the same as W203’s. There is info on both of the independent install/retrofit links on my
website about part numbers. You can usually find COMAND units on eBay but be cautious about what
you buy there. This is a picture of the head unit I used:
I purchased a COMAND adapter harness for my “C” and cut that up to do the install. This probably wasn’t
necessary but made the install easier for me as I didn’t have to locate/find the C1 and C2 connector/shell
pieces that plug into the back of the COMAND unit. The part number for the harness is A203 540
0909 which sells for about $45. This is what the harness looks like:
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