The high mat drip would indicate an evaporator/condensation leak. The drip tube is likely clogged. I can't remember, I think it's reachable through the engine bay. Or at least visible. Weed eater string works great to snake drip lines. I use a thin line for pano roof drains.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)