To estimate the price of the 2015 Mercedes GL500 V8 4.7L Twin Turbo with 108000 km mileage, I first considered the selling price of a similar car with a 4.6L engine and 96000 km mileage, which sold for SAR 135000 in December 2023. Given the similar condition and specs, this provides a strong reference point. Next, I reviewed the listed prices of similar cars. The closest match is a 2015 GL500 V8 4.7L Twin Turbo with 106670 km listed for SAR 128000, delisted in October 2023. Another similar car with 108000 km was listed for SAR 131000. These listings suggest a market range around SAR 128000 to SAR 131000. Considering the actual selling price and the listed prices, I adjusted for the slight differences in mileage and the time since the last sale to arrive at a fair market estimate.