Welcome back to the forum.

When I had my 1993 300E (3.2), it would fail smog at every test.

Installing a new cat for about $200 allowed it to pass.

Sun Valley transmissions in Van Nuys is the place to go for your transmission.

A visit to Sun Valley Transmission, Van Nuys, CA

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".