When do the gasoline direct injection engines receive the particulate filter?

can someone give me information about when the 1.0 115hp direct injection petrol engine will meet the exhaust gas standard as of September 2018? Often it is claimed that a particulate filter is required for this. Is that true? The Seat dealer is no help at all. He just thinks that he has no information available. I don’t want to believe that, because Seat will know very well – whether the 115 hp 1.0l engine needs a particulate filter to meet Euro 6c (currently it meets Euro 6c). According to ADAC only Euro 6b) -from when exactly this is installed or from when Euro 6c is fulfilled. Especially if a particle filter is needed, the preparations must already run at full speed, since they have to be produced at the supplier first. I am quite stinky that the Seat dealer pretends that no one in the world can answer these questions. Please for help here. Thank you