EPC has two lengths listed for a w115 220d (is this your model?). Part 1155420207 is 1140mm long and 1155420307 is 1210mm long. I have no idea why two lengths are listed. They cost about $100 US from a US MB dealer.

The cables for a 230.4 could be the same as for a 220d, or could be much longer. EPC lists the 1140mm one, as well as 1750mm and 1860mm for that model. So I guess it could be the same, or it could be quite different.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).