To estimate the price of the 2020 Mercedes E250 E 250 CGI Standard convertible with 124000 km mileage, I considered the listed prices of similar cars. The closest match is a 2020 Mercedes E250 E 250 CGI Standard convertible with the same mileage listed for AED 115000. Other listed prices include a 2019 Mercedes E250 E 250 Standard coupe with 69000 km for AED 99999, and two 2021 Mercedes E250 E 250 Standard sedans with 53700 km and 47500 km both listed for AED 139000. Given the higher mileage and the convertible body type, the price should be adjusted downwards from the listed price of AED 115000. Considering these factors, I estimate the market price accordingly.