what else would I need to get this working?

I have a 2003, DSP, non nav.

On my VW I had to buy an antenna off ebay, so you can seriously just hook everything up and plug into existing wiring? No coding necessary? And is all bracketry or mountings for the head unit already in place in all Xs?

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards