Why a history check matters on a Audi A5
B9 A5 (2017+) shares EA888 + S-Tronic with A4. RS5 variants use the 2.9L bi-turbo V6 also found in Porsche Panamera — carbon-buildup at >100,000km is documented. Sportback variants have rear-hatch power-strut wear at 4-year mark.