Facelift E53 3.0d has M57N engine but there are two variants. EU3 without DPF and EU4 with DPF. On EU4 version there is a separate throttle valve before EGR and EGR has a cooler. Anyways DDE needs to be mapped if you disable EGR.

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey