To estimate the price of the 2019 Mercedes GLE450 V6 3.0L Twin Turbo Standard with 142000 km mileage, I considered the listed prices of similar cars. The 2020 model with 100000 km is listed for SAR 220000, the 2019 model with 77000 km is listed for SAR 226000, the 2020 model with 51000 km is listed for SAR 252000, the 2020 model with 40000 km is listed for SAR 259000, and the 2021 model with 29000 km is listed for SAR 343000. Given the higher mileage of the target car (142000 km) and its older model year (2019), I adjusted the price downwards from these listings. The 2019 model with 77000 km is the closest in year but has significantly lower mileage, so I further adjusted the price to account for the higher mileage and depreciation.