Hello, I have been driving a MB r129 500SL (1992) for about 4 years and have had the car completely restored (underfloor, engine, paint and leather equipment). Now the exhaust line leaves me in the lurch. The catalyst has given up the spirit and I have got several catalysts on the “after-market” and no one has held out for more than 50 km (the game now lasted 3 times and now it is enough). I need according to MB parts catalog following KAT 1294900319. Now my 2 Questions: 1. there are different parts numbers for the 500SL, which according to different sources should also fit: among others 1294901314 or 1294901414. does anyone know if there is actually a difference in the 500 series pre-mop? 2. Since there is no longer the catalyst at Mercedes, what recommendations can you give me for a KAT production? I had always read something from a Mr. Fischer from Bad Tölz in another chat?!? Thank you for your comments and Inpu ts. Best regards Michael