Hi there m, I own a 2009 Touareg with the RNS-510 touchscreen. I'm currently having problems using my MDI connector with a Viseoo Bluetooth transformer (after a short time of listening to music, it just cuts off). So I am considering upgrading to installing a Bluetooth module. I've heard of people talking about a certain harness that is needed in my car... And that I would need a 9w3 Bluetooth module to fit it. When I called several VW dealers and spoke to their specialist. They just couldn't give me any satisfying information concerning my options. Is there maybe anyone here that could give me more possibilities for audio streaming and even being able to make phone calls? In attachment the best picture I currently have of my radio and steering wheel if any more pictures or information is needed to help me out. I'd be happy to give you this.
Yes you can use the 9w3 unit with this cable to complete the VW setup.
Wiring Harness Cable FOR VW RCD510 RNS510 RNS315 9W7 9W2 Bluetooth 1K8 035 730 D | eBay
It will not stream Bluetooth music but will give you info in your MFD. the 9w2 unit will not do either. The 9w7 but it will steam music but will not work with your MDF or your steering wheel controls I don't think.
Another option is fiscon
Kufatec 36495 Fiscon Bluetooth Modul FOR VW Tiguan Sharan Caddy Scirocco Touareg | eBay