https://www.caraudioexcellence.com.au/product-page/aerpro-chmc5c-steering-wheel-control-interface-to-suit-mercedes-c-class
Aerpro CHMC5C Steering wheel control interface to suit mercedes c class | Car Audio Excellence
The Aerpro CHMC5C Steering Wheel Control Interface (SWC) allows you to upgrade to an aftermarket headunit whilst maintaining use of your factory steering wheel...