the Dinan website also says that Stage 2 software is only good on cars manufactured after Sept 2009
where do i find the manufacture date?

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2009 750Li - Space Grau Metallic, Camera pkg, Conv pkg, Driver Asst pkg, Lux Seat pkg, Lux rear seat pkg, Prem sound pkg, Sport pkg, HUD, Massaging rear seats, Smartphone integration, Sat radio