[DrGER]

Competition Plus appears to be for the B9 platform; your MY2010 A5 is the B8 platform.

ETKA shows only one variant for the B8 facelift: 8T0821171M (left) / 8T0821172M (right): wheel housing liner Audi A5/S5 Coupe/Sportback (A5CO) 2013 year Audi EUROPA 821050

Same for B9 A5 models: 8W6821171C (left) / 8W6821172C (right) -- no change from MY2017 onward. --g