Ever wondered what the funny fuel pre-filter was for?

This is a diesel pre-filter on a 240d (w123) after only about 850km/530 miles.



This is the debris that was left on the tray after I tried to drain the pre-filter:


There was still plenty of stuff in the pre-filter that refused to leave.


I have save the main filter and will cut it open after it has drained completely. You will, of course, not be spared the pictures.


But how how does stuff like this happen? This is the first time I have ever seen this funny...

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