Audi S8.
What to Check Before Buying.

The Audi S8 is a high-performance luxury saloon that combines serious speed with executive comfort. Typically owned by enthusiasts who value understated performance, it offers V8 or V10 power depending on generation, wrapped in a discreet four-door body. While impressively engineered, the S8's complexity means maintenance costs can be substantial, and certain mechanical and electronic systems require close scrutiny before purchase. Buyers should focus on full service history and evidence of preventative work on known weak points.

The average used car has 3+ known model faults the seller won't mention.