Hi there! I am also interested in doing this retrofit job to my 4.8is 2004 made RHD X5. I just search in Realoem.com and found that lots of parts required to be installed, including the motors, C-pillar trims, trunk trims. Is the wiring pre-installed by factory or I need to install the wiring harness myself? The trunk retractable cover is also different, the seat belt in the middle rear seat is also different. I seems lots of parts I need to buy and install. Thanks for help!

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--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.