Hmmm, I was under the impression it had DPF. Don't all new diesels in Europe have DPF's to meet emissions?
http://www.netcarshow.com/bmw/2013-m...drive_touring/
The exhaust treatment system includes a diesel particulate filter and oxidation catalytic converter, which is located close to the engine in the same casing. More efficient exhaust cooling, meanwhile, minimises the formation of nitrogen oxides. And standard-fitted BMW BluePerformance technology, which includes a NOX storage catalytic converter, helps the new diesel engine powering the BMW M550d xDrive to meet the EU6 exhaust standard not due to come into force until 2014.