A Mercedes-Benz 400 averages €23,668 across all model years. Right now 5 are listed for sale, with the cheapest sitting around €16,950 (typically older years) and the priciest around €30,490 (recent years). The median is €24,450. A good price for a Mercedes-Benz 400 is under €22,000; anything over €24,450 is on the high side compared with similar listings. Selling to a dealer instead of privately usually means a lower price: expect roughly €18,338 to €22,005 for this model, depending on year and condition.