Nothing written in stone. Driving habits and quality of parts. Have a major effect on how long they last. This 240D perhaps has the least stressed clutch still in service today on a car. If not it must be pretty close.

If I had to change one I would try for the original makers parts. Hoping they had not reduced the quality of them in some way. Plus the price was not too high.

I have a feeling that the majority of the 240ds at around 200K with manual transmissions. Still may have the original clutches. No way to verify that though. So I also could be wrong.