Use a 16 mm wrench to push on the power steering line tool. Works great. Get worm gear clamps for reservoir hoses. The OEM clamps are a bad design. They are really not reusable. On the vanos line washers, use tacky Form-A-Seal gasket. Brush a little on each washer side. No more leaks!
Remove the alternator, air ducts, and revoir to reach the OFHG. Same thing, use tacky Form-A-Gasket to hold the gasket in place. Plus seal better. With the X5 in the air, may be able to reach the back side bolts better. Use a mirror with a light on it to check the OFHG is flat. You can buy a mechanic mirror with a light at Harbor Freight.

As advised, with the battery disconnected, degrease! I used a pressure washer on the entire engine bay and hood. Small brushes from Amazon really help remove grim.

Take pictures to post! I'll be doing the plate and diff oil soon too.

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