I put a mail-order Eberspaecher rear muffler on my 300E and I was very happy with it. It was easy to install with the car on jackstands and I have no reason to believe that a center unit would be any different.

I have also had good success with a couple of Timevalve systems over the years, but you are better off to get everything from the manifold back. He builds to MB specs and if there is some aftermarket stuff in the system, the Timevalve pieces may not fit. Timevalve has never got the sound quite right IMHO.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe