Hi Imbroke,

I don't know much about Mercedes specific cables but if by Bowden cable you mean a cable that is much like the ones used on bicycles...

http://en.wikipedia.org/wiki/Bowden_cable

These cables (as you can see in the link) work by applying tension on the outer cable sleeve so all you have to do is find a way of clamping the end of the sleeve (conduit) but make sure the cable moves smoothly - so if you can oil it or spay some white grease down it now would be a good time - then you've fixed the problem.

I don't know about your situation but in most Bowden cable set ups there is often a bit of extra length in the cable and conduit so you may get away with trimming the sleeve (conduit) if you need to.

Good luck!