I am on the verge on buying a used year 2000 e39 530i sports. The thing is the car came with OEM 16:9, TV Tuner but does not come with SatNav. What parts do I need for SatNav retrofit? I know I need the OEM MK4 but what else? Di I need a new Wiring Harness?

Chasis No : CE60027

Thanks in advanced.