The heater option in mine has the SS coil PLUS the hose line being heated also. The parts guy included a schematic also that showed my particular extra and said that the 350SD came in both versions, maybe a northern climat version. Anyway, I'm not going for the $114 hose and not going to continue to struggle with getting the SS coil properly seated in the reservoir. I'l just use fluid good to 60 below. Back to my question about replacing the wood trim above the steering wheel abd below the instrument cluster. My replacement for that is coming in the mail right now and the original is badly messed up. Does your manual have that procedure?