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All new diesel cars sold in Europe must have urea injection, EGR and particulate filters (I don't know if the law mandates the actual technologies, but those are the thing you must have to meet the pollution limits). They will allow you to drive only a few kilometers when you run out of urea, basically you are forced to drive to the petrol station to fill it up.

In a few years those "clean" diesel cars will be sold on the used market in Eastern Europe / Africa / Middle East. At which point the new owners will disable all the pollution control systems to eliminate maintenance hassles.

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