The Pioneer AVIC-F9310BT is a dedicated VW touch screen sat nav system. We integrated the system to work with the original steering wheel controls. Combined with the look of this unit  the entire job looks very much like a factory installation.
The original VW parking sensors display optically on the NEW Pioneer touch screen as well (see pics in the link at end of this post) and the VW Air Conditioning controls also display on the system.
What else? Well, the Bluetooth is controlled by the ORIGINAL VW button and Full Radio/DVD/iPOD/iPhone/USB/MP3/NAV/Traffic/Bluetooth integration is achieved.