A Mercedes-Benz ML 420 averages €8,261 across all model years. Right now 3 are listed for sale, with the cheapest sitting around €5,000 (typically older years) and the priciest around €12,033 (recent years). The median is €7,750. A good price for a Mercedes-Benz ML 420 is under €6,375; anything over €9,892 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €5,812 to €6,975 for this model, depending on year and condition.