Originally Posted by RED DOG

Sorry but I agree with others that responded. You're wasting your time . . . Buy a new alarm siren . . . You want this part number . . . 2198203226 . . . The new unit will also provide audible "chirps" when you lock and unlock your Crossfire.

Look here: https://www.ebay.com/itm/Mercedes-Be...72.m2749.l2649