Probably NO not factory-fitted.
Year of manufacture estimate: The serial number (the last 8 digits: 01576933) indicates production between approximately 2008 and 2009.
Newer models from 2011 onwards (Euro 5) often have serial numbers in the range of 024xxxxx (2.4 million) and higher.
Emissions standard: Vehicles from this period (2006–2010) generally meet the Euro 4 standard.
DPF status: The Fiat Ducato Type 250 with Euro 4 was not equipped with a diesel particulate filter (DPF) as standard.
At that time, it was often an optional extra.