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[cecil]

Hi all I have just carried out a reg check with my 44s. It appears that they are both compliant and I can motor away as happily as possible in london.
My opinion of the scheme - not good for London trade however remains.
Just thought I would let you know.

[mr singh]

the ULEZ is mainly to get rid of older (pre 2015) diesel vehicle as they produce more NOx and particulates. cars with DPFs produce less particulates but when the DPF regen is carried out all that soot is being burned off into smaller particles so its sort of negating the effects of a DPF.

as it stands my 454 is ULEZ compliant but my mums (2013) C-Max and my (2015) XF have to pay ULEZ as they are both diesels.

even petrols have filters in the exhaust now. they have GPFs but they work differently to DPFs

[CrazyG]

All a con really as there has been scientific evidence since the later revised DPF's were introduced
that the human body actually rejects large NOX particulates...the type produced by older non-DPF
and earlier versions of DPF filters equipped on older cars....BUT...the same evidence did confirm that
the far more smaller microscopic NOX particulates generated by the later more modern DPF's; including
those produced in regeneration; are ALL absorbed by the human body, and those are dangerous !

As a side note, from what I am aware, all UK 454 CDi's only ever had a Catalytic converter....no DPF at all !
My current 56 plate (2006) 95hp CDi only has a Catalytic converter...and the original exhaust (at the moment).
BlackCDI advised in one of his posts that apparently in Germany they installed DPF's for the last year of
production (AND.. they also installed an electronic EGR from the W169 A-class vs the vacuum operated one
from W168 A-class).