I started by examining the selling prices of similar cars. The most relevant data point is the 2014 Mercedes S400 with 90000 km sold for 82000 SAR in February 2024. Our target car has lower mileage at 66000 km, which typically increases its value. The 2015 and 2016 models sold for significantly higher prices, but they are newer and have higher mileage, so they are less directly comparable. The listed prices for 2014 models vary widely, with one at 82000 SAR and others at 170000 SAR, but the 82000 SAR listing aligns with the actual selling price, suggesting the higher listings are unrealistic. Considering the lower mileage of the target car, I estimate its market price slightly higher than the 82000 SAR sold price, accounting for the better condition due to lower mileage.