First unplug the module connector. If the short is still present you have to start poking the wiring between Terminal 30 and Terminal 15 wiring to module.

https://www.pss-autosoft.net/diagram...3_EA70006A.htm

https://bmwteka.com/wds/en/e53/0454c101

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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