[EuroDan]

I'm trying to upgrade my A5(not s-line) to the S5 outside.I got the side skirt( 8T0854931A )and rear bumper( 8T0807521B)parts number. Does anyone know they will fit or not, or how can I can find the answer? thanks for any help!

The skirts fit both Sline and non-Sline models, so that's not a problem.
The rear bumper will fit as well, as long as you replace the whole rear bumper, not just the insert.