Originally Posted by
onehundred80
I'm guessing that at some point you powered up a circuit that was in the airbag system while that circuit was not complete. If so the dealer is the only one that can possibly reset that light although I doubt it.That loose connector is the cause of your problem it should have been correctly wired to the new seat wiring and not made redundant.
Apparently the Icarsoft MB II scanner will read and reset SRS system (airbag) on the R170, presumably on the Crossfire also. I picked one up mostly for the GLK, as I find the the cost of service at MB dealers to be outrageous. I hope I never have to use it, but just in case.