To estimate the price of the 2018 Audi S3 Quattro I4 2.0L Turbocharged, I first looked at the selling price of a similar car: a 2016 Audi S3 2.0L TFSI I4 with 171500 km mileage, which sold for AED 43500 on 2023-10-29. Given that the car in question is a 2018 model with 159000 km, it should be valued higher due to being newer and having slightly lower mileage. Next, I reviewed the listed prices of similar 2018 Audi S3 models. The prices ranged from AED 89000 to AED 121000, with mileage between 112000 km and 125903 km. Considering the higher mileage of the car in question, its value would be slightly lower than these listed prices. Additionally, I noted the listed prices of 2016 and 2017 models with similar mileage, which ranged from AED 40000 to AED 82000. Taking into account the depreciation and the condition of the car, I adjusted the price accordingly.