OK - in the second and third images in your first post (right side of car), the GREY wires are the headlight level sensor wires. It looks like the cars with EHC and LWR use a rear ride height sensor with TWO outputs - one for the ride height and one for the head lights. Yellow wires are ride height, grey are headlights.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)