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).

Thanks for that mate, Yh it's just knowing which size it actually is, I don't suppose anyone on here has bought one and knows the size already?

You could take the old one off and measure it.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

Yh thing is I'm not too technically minded so taking it off would have to wait a month or so when the car is legally on the road

The dealership could tell you by your VIN. If this site sells it they do a good job listing the vin split.

Just rang them up and they said the speedo cable length is 1860mm!