My friend Hans uses Eberspaecher, but says they don't last as long as the factory one in spite of having the MB logo. Who knows. Ansa is good, too, dont' know about Borsal.

At any rate, I'd replace the muffler -- if it has a clamp, it's a replacement, if it is welded on, it's factory.

Chances are the internals are rusty, too -- do you notice an "sporty" sound out of the back (separate from the leak, that is!)? These are VERY quiet in good shape, so quiet you cannot hear the exhaust in normal driving. Any exhaust noise means they are going fast....

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!