I have amassed the following PDFs and know there are more documents out there. As I find more, I will update this post. If you have more, kindly share so we can increase the community's knowledge base.
Manuals
• US Owners' Manual
X5 2014 UPDATED Owner's Manual.pdf
• OBD Fault Codes
BMW OBD Codes - rev1-2.pdf
• Site for looking up error codes (via Google Translate):
Code Lookup
Engine, Transmission, Drivetrain
• MPPK Power kit for US market 35i
PIDoc8299.pdf
• N57 MPPK Power Kit (NA for US Market)
BMX F15 N57 M Performance Power Kit.PDF
• Transmission fluids and technical OEM doc for all supplied manufacturers
Fluids and Kits for Passenger Cars ZF_Remanufactured_Transmissions.pdf
• Detailed ZF transmission information
VirtualTCU_BMW_QTronic_ZF_2014.pdf
• Transmission system overview (for all ZF customers)
ZF Transmission overview from its manufacturere.pdf
• Dr. Hubbar's presentation on assisted driving technology
Dr Hubber Presentation on Automated Driving .pdf
• N57 (30d/35d, 40/50d) Diesel technical manual
N57TU Engine.pdf
• Diesel engine evolution and technologies (through M57)
AdvancedDiesel with BluePerformance.pdf
• N63 (50i) V8 engine technical document
02_N63 Engine_WB.pdf
• N55 (35i) engine technical document
ST916_-_N55_Engine.pdf
• Suspension system
03_BMW Suspension Systems.pdf
Electronics
• KAFAS camera system and diagrams
KAFAS System and diagrams.pdf
• Driver Assistance System (on F30)
Driver Assistance System (on F30).pdf
• High Beam Assist and Anti Dazzle system and diagrams
Non-glare high-beam assistant.pdf
• Connected Drive known
security loopholes and vulnerabilities as of MAR 2015
bmw connected drive security-loopholes.pdf
Marketing
•
2016 Ordering Guide and Price Guide 2016-BMW-X5-F15-Ordering-Guide.pdf and
2016-BMW-X5-F15-Pricing-Guide.pdf
•
2016 X6 Order and Price Guide (US) 2016-BMW-X6-F16-Ordering-Guide.pdf and
2016-BMW-X6-F16-Pricing-Guide.pdf
•
2016 X5M and X6M Press Kit and data - Australian market
X5m and X6m Australia Press Kit and Technical Info.pdf
•
2016 Canadian order and price guide for X5 and X6, and X5M and X6M
2016MY X5, X6 and X5M+X6M Product and Pricing Bulletin.pdf
• Official 6WB instrument cluster upgrade
BMW 6WB Official Instrument Cluster Upgrade.pdf
• About Connected Drive
connected drive marketing brochure.pdf
• 2015 changes and pricing update press release
BMW USA 2015 Pricing and Update Info.pdf
• X5 Global Brochure validates max towing capacity, otherwise not vy. informative:
2014 X5_flyer global.pdf
• Feature and option codes
X5 Feature and Option Codes and Desicription.pdf