To estimate the price of the 2019 Mercedes C180 with 42000 km mileage and European specs, I analyzed the listed prices of similar cars. The closest matches are 2019 models with similar mileage and American specs, listed between AED 72000 and AED 95000. The average of these prices is around AED 83500. Considering European specs might add a slight premium, I adjusted the estimate upwards. Additionally, the condition of the car is not specified as excellent, so I did not add a significant premium for condition.