These are the related parameters with NCS on airbag module (MRS).

Passenger seat belt buckle:

GURTSCHLOSS_BEIFAHRER_1

GURTSCHLOSS_BEIFAHRER_2

Passenger seat occupancy sensor:

ERKENNUNG_SITZBELEGUNG_1 passenger seat occupation

ERKENNUNG_SITZBELEGUNG_2

SBE1_STATUS_VERZ_1

SBE1_STATUS_VERZ_2

SBE2_1 (this should already be not active)

SBE2_2 (this should already be not active)

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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