Steering Wheel control Primary harness adapters convert the commands from your car's steering wheel controls to a code that an aftermarket radio can recognize. A patch lead is also requires for SWC type systems based on the brand of head unit you have. for more details check out our you tube video. http://aerpro.com/video/control_harness_installation CHVW1C Volkswagen Touareg 2003 up Multivan 2013 up ( Supports Volume +/- and Mute Only ) DOES NOT SUIT VW RCD550 HEADUNIT
This product is also known to work in the following vehicles: Volkswagen Touareg 2004-2010 Volkswagen Touareg 2010- Volkswagen Transporter T5 2004-2010