To estimate the price of the 2016 Mercedes E200 I4 1.8L Turbocharged Standard with 158000 km mileage, I analyzed the listed prices of similar cars. The closest match is a 2016 Mercedes E200 I4 1.8L Turbocharged with the same mileage listed for SAR 83000. Other relevant data points include a 2014 model with similar specs listed for SAR 56500 and SAR 68000, and a 2018 model listed for SAR 125500 and SAR 160000. Considering the age and mileage, the 2016 model's price should be lower than the 2018 models but higher than the 2014 models. The 2016 model listed for SAR 83000 seems reasonable, but considering negotiation and market conditions, a slight reduction is expected.