Given the lack of actual selling prices, offers accepted, and dealer sales data, I relied on the new car prices and applied depreciation logic. The 2025 Mercedes-Benz GLS 450 4MATIC starts at AED 496900. Assuming a 10% depreciation per year, the value of a 2017 model would be approximately 50% of the new car price. This results in an estimated value of around AED 248450. Considering the car's mileage and average condition, I further adjusted the price down by 10%, resulting in an estimated price of AED 223605.