AFTER CHECKING MANY CROSSFIRES, I HAVE FOUND THAT THE PLUGS HAVE NOT BEEN INSTALLED BY THE DEALER AT DEALER PREP TIME. THE PLUGS ARE DESIGNED TO SEAL THE AUTO BODY AGAINST WATER, DIRT, SNOW, ETC. DAMAGE. AFTER CHECKING MANY X-FIRES, I HAD FOUND ABOUT NINE OUT OF TEN AUTOS ARE NOT SEALED.
THE PLUGS ARE IN ONE OF THE PREDELIVERY PLASTIC BAGS THAT ARE SENT IN THE AUTO.
THE INSTRUCTION SHEET IS NUMBER MY2004, A193 583 0071.
TO ACHEIVE A GOOD SEAL, SPRAY THE PLUG WITH UNDERCOATING SPRAY AFTER THE INSTALLATION.