the harness I have sounds like the engine harness. It is part # 129-540-72-06. Checked with mercedes today and they do not sell a pigtail or part of a wire that will go onto the mass air flow .If you know where I could get one like you spliced in let me know. The cd or dvd sounds exactly like what I need. if you see one on e-bay let me know the listing # and I will buy it. Thanks