Some of the petrol bunks near my place has stopped taking diesel vehicle for pollution certification. One has put up a board saying only petrol vehicles. And last day I found a place near my hometown where I took this certificate with new kind of testing. They attach a probe to the engine to check the vibration, take some reading with some equipment at different rpms and they finally check the exhaust at different rpms. When I asked about this new procedure he also didn't have any clue but this is the way it is now for diesel vehicles.