My car is a late model (5/83) 240D 4-Speed. I needed a new speedometer cable because my current one broke inside and would just spin freely.

So I ordered 123-542-77-07-MBZ which is a the longest cable they make (1420mm) and from 219675. Now I gave it to my mechanic to install and he calls me and tells me it is too short. The end that goes into the back of the speedometer isn't making contact with the speedometer itself. From what he tells me, it screws in, but the little tip doesn't make contact.

I don't understand what the problem is then. This is the longest cable they make so I know I didn't make the mistake of ordering the shorter one or the one for the automatic cars.

Anyone have any ideas?

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'80 300SD - '83 240D - '00 E55 AMG - '02 G500