Hi
I have just bought a command module which had a range of serial numbers at the side, but it did not fit my car. The car is c200 classic kompressor and is 2003 model. I am so confused i have this thing in my sitting room which is too big to fit my car. The guy who sold it wants me to give him the correct part number so he can exchange it and i pay the difference. i dont know where to find the part number that will fit it, or if any command module will fit my car at all. At the moment i ahve a boring CD player and radio. It appears this can be removed and a command module inserted in the hole. But which model of command module. Mercedes benz will not tell me the part number unless i buy it from them for £2500 and fitting.

HELP