Are you saying the US common rail model doesn't have the particle trap in the exhaust, or am I misreading your post? As for the emissions being cleaner is there any proof of this? Also things are a bit different in the States because if the PD motor has never been sold there it would seem mad to tool up the new production line for it even if Volkwagen were going to phase it out solely for economic reasons, rather than due to emission problems (which may or may not exist). Europe on the other hand is already tooled for the PD motor and it exceeds the current emission standards so there's no hurry to switch (which might mean the PD motor keeps being produced here for at least another year).Looking into it, for US cars, bluemotion = common rail. For Europe, bluemotion = added emissions scrubbers, can be pumpe duse or common rail.