Why a history check matters on a Audi A6
C8 A6 (2019+) shares MLB Evo platform with A7/A8/Q7. 3.0 TFSI V6 has a documented timing-chain rattle on cold start. Air suspension on quattro variants fails at 80,000+km. Pre-2019 C7 A6 used the 2.0 TFSI EA888 with same timing-chain concerns.