To estimate the price of the 2012 Mercedes C200 I4 1.8L Turbocharged Standard with 205000 km mileage, I first looked at the selling prices of similar cars. A 2012 Mercedes C200 with 181000 km sold for SAR 30000 on 2024-01-13, and a 2013 Mercedes C200 AMG with 164000 km sold for SAR 40000 on 2024-08-09. Given the higher mileage of the target car, its value should be lower than these. Next, I reviewed listed prices: a similar car with the same mileage was listed for SAR 29000, and another with 188000 km was listed for SAR 27500. These listings suggest a market range. Considering the higher mileage and average condition, I adjusted the estimate slightly lower than the lowest selling price and the listed prices to reflect the car's condition and mileage.