Wow, Pre-H20! You have certainly been through it. On the moon roof, I would look into your switch being toast.Get a new one of the bay of flees and fit it. Glad you go the water out. In the UK at the moment its cold, humid and damp. Heres a tip - So I have those little wardrobe dehumidifiers in each of the door cards. It mean the car is dry inside and the window clear quickly in the morning.

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BMW X5 E53 3.0 Diesel Sport | Sapphire Black Dakota Beige Leather interior | Year 2004

What I had updated
Carbon Effect Steering Wheel
Panoramic Sunroof Fix
PVC Replacement
All glowplugs and glowplug regulator
New discs and pads all round
All new front suspension links, bushes and rods