If you have vacuum actuated turbo (instead of electric servo actuation) and no throttle valve before EGR it's EU3 variant without DPF. Also injector part numbers are different on these EU3/EU4 versions.

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey