2018 Mercedes SL400 • Compare 4 used cars with valuation

Market overview: Price Analysis (October-2026): A used 2018 Mercedes SL400 typically costs between £17,532 and £38,518 • On average, used 2018 Mercedes SL400 cars have covered 28,748 miles – with a few high-mileage examples reaching up to 40,400 miles • Depreciation and price trends over the last 12 months for the 2018 Mercedes SL400 stand at £0.