I see you post this issue on numerous MB forums, with no replies or other suggestions coming back. This got me to think that the issue may be other than an AC issue. Please describe the problems you are having with the car that lead you to scanning and getting this code.
A forum community dedicated to Mercedes-Benz owners and enthusiasts. Come join the discussion about performance, classifieds, troubleshooting, maintenance, and more for all Mercedes-Benz and AMG models!