The W123 230 was introduced in 76 with the M115 engine carried over from the W115 230.4. The 230 was replaced by the 230E with the M102 engine in 81. The 230 was available in the US in 77 and 78. It was a low end car by MBUSA standards having a standard and optional equipment range similar to the 240D. I don't think the US 230 was offered with MT.

The 230 was available as a 230 sedan, 230C coupe and 230T wagon. Likewise the 230E was available a a 230E sedan, 230CE coupe and 230TE wagon.

Sixto
95 S420
87 300SDL