To estimate the price of the 2018 Mercedes C250 I4 2.0L Turbocharged Top, I considered the listed prices of similar cars. The closest match is a 2018 Mercedes C250 with the same engine, variant, mileage, and specs listed for SAR 123000. Another relevant data point is a 2017 Mercedes C250 with a higher mileage of 150000 km listed for SAR 109500. Given that the 2018 model is newer and has lower mileage, it should be valued higher than the 2017 model. However, the listed prices are generally higher than actual selling prices. Therefore, I adjusted the estimate downwards from the listed price of SAR 123000 to account for this factor.