Per the PO the Sensor was replaced at least once, it light came on, they changed the sensor and the light would not go out, so they changed the cat. But that could have been a long, long time ago too. He did tell me today that the car sat for the last two years and was never started. Then just before I got it he tried to start it, it started right up, but would not idle. Battery (interstate) was changed just before he parked it as were the tires.

Boy it sure ides nice now, so quiet you cannot hear the engine running with the windows up and the slider closed.

Well if I replace the stuff now it should be good for a few years anyway.

Would you go Generic Cat or the MB one? MB seems to come with the front pipe and the O2 Sensor port. Cheapest I have found it $299. Generic cats(only) are way cheaper.
I'll take it to a shot and check the mufflers too, might as well look at the whole thing.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.