Looking at one of the images from the Google search above has me wondering if this is for petrol only versions?

Petrol is obviously far more combustible than diesel which may explain the charcoal filter and breather.

http://ww2.justanswer.com/uploads/eurotec/2009-10-12_120949_42003555.jpg

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David


1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)