The car to be estimated is a 2017 Audi A6 FSI Quattro S-Line Turbocharged V6 2.8L 55 TFSI (Top+). The most relevant data point is the 2016 Audi A6 I4 2.0L Turbocharged, Variant: 55 TFSI (Top+), which sold for 80000 SAR on 2024-09-04. This car is one year older and has a smaller engine, but it is the same variant. Considering the 2017 model year and the larger V6 engine, the estimated price should be higher. Other data points include a 2016 Audi A6 35 FSI Quattro V6 3.0L Turbocharged, which sold for 55000 SAR on 2024-07-24, but this is a different variant and has a higher mileage. The 2016 Audi A6 45 TFSI (Top) sold for 46500 SAR on 2024-04-28, but it is a lower variant. Given these comparisons, the 2017 model with a V6 engine and the same variant as the 80000 SAR car should be valued higher, considering the newer model year and engine size.