To estimate the price of the 2017 Mercedes E400 V6 3.0L Twin Turbo Standard sedan with 218600 km mileage, I first considered the selling price of a 2015 Mercedes E400 convertible with 148000 km sold for SAR 120000 in September 2023. The convertible body type typically commands a higher price than a sedan, and the 2017 model is newer, but the target car has significantly higher mileage. Next, I looked at listed prices: a 2017 sedan with 143000 km is listed for SAR 133500, and another with 83000 km is listed for SAR 175000. Given the higher mileage of the target car, its value should be lower than these listings. Considering the depreciation due to higher mileage and the fact that listed prices are often higher than actual selling prices, I estimate the market price to be lower than SAR 133500, accounting for the additional 75600 km on the target car.