I have a 97 C230 sedan & decided to replace all the seats from a 99 C230 sport sedan, all the wires hooked up fine except a wire for the passeger's side seat which has a different type plug for the 99 passenger's seat I assume this has something to do with the SRS due to the fact my warning light is on. The original passenge's seat has only 2 pin plug the later year has 3 pins. I took the harness but have no clue which wire to tap in & what the "extra" wire is for. Your help will be greatly appreciated.