4G0919070 MMI Radio Volume Knob Rotary Button Switch & Menu Switch Setting Cover Cap For Audi A6 Allroad Quattro C7 A7 2012+ - Price history & Review | AliExpress Seller - WAN
Dealer wanted $1k to replace MMI knob and start button - $30.00 and 20 min YouTube = done! (2018 A6) : r/Audi
4G0919070 MMI Radio Volume Knob Rotary Button Switch & Menu Switch Setting Cover Cap For Audi A6 Allroad Quattro C7 A7 2012+ - AliExpress
MMI Volume Knob Menu Switch Panel Replace q For Audi A6/S6 A8/S8 Q7 RS6 Rs7- | eBay