A few numbers required - starring DPF


Senior Member
Aug 25, 2009
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Your Mercedes
C220 CDi Avangarde Estate
Help much appreciated.

When my C220 CDi is starred on Friday by my supplying dealer, I would be keen to know what the threshold numbers are for %ash, %soot, pressure etc.

As I understand it, the ash % steadily grows during the life of the DPF as it is the result of the soot burn-off during regeneration.

At what % is the ash content such that mercedes would order a change.

If I'm presented with figures that are too high, I want to be armed with the knowledge to argue if they say 'It's fine sir'.

Many thanks in anticipation.

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