X5 back from Dealer today and here are the details on the rear hatch rattle fix:

Adjusted rear hatch. Adjusted Tailgate Catch. Additional noise heard from C Pillar Area. Pertains to SIB 51 09 09 Removed and installed both left and right Quarter Vent Trim. Applied Felt Tape along contact points as needed. Rattle noises heard eliminated at this time.

Hope this helps others with the Rear Hatch Rattling noise getting it fixed under warranty.