Here are a few mods on my new E70:
1.
BMW OEM wheel locks Model 36 13 6 792 851, 4 x M14 x 1.25 bolts. Requires 17 mm socket and torque wrench to install. Tighten to 140 nM. "Key cap" fits perfectly in storage tray under cargo shelf.
2. BMW nonsmoker ashtray insert. Model 51166954946 Replaces regular ashtray insert.
3. BMW fitted luggage mat. Model 51470444754. Has tall lip all around it to keep water from carpet. There is a used one on ebay right now for $40 that looks like new.
4. Cargo lid lift kit purchased from eBay seller. Search "BMW X5 Cargo Cover Spare Tire Cover Lift Support Kit" Installs in minutes. Holds cargo shelf up.