I have a 1995 S500 Coupe, that has failed the emissions inspection twice, here in Massachusetts. Have had the car gone through by a Mercedes Benz dealership. Only thing left to look at is the CAT...$$$. Was wondering if anyone has had similar issues, and can lend any guidance. Other than this 'slight' problem, the car is mint and runs perfect. She only has 66K on her. Your thoughts are greatly appreciated.