To estimate the price of the 2016 Mercedes GL500 V8 4.7L Twin Turbo Standard with 177557 km mileage, I first considered the selling price of a similar 2015 model with a 4.6L engine and 96000 km mileage, which sold for SAR 135000 in December 2023. Given the higher mileage of the target car, I adjusted the price downwards. Next, I looked at listed prices of similar cars: a 2016 model with the same engine and mileage listed for SAR 113500, and another 2016 model with 146000 km listed for SAR 93000. Considering the higher mileage of the target car, I adjusted the price further down. Additionally, I noted a 2015 model with 207500 km listed for SAR 77000 and a 2014 model with 218000 km listed for SAR 63000. Taking into account the year, mileage, and condition, I estimated the market price accordingly.