Mercedes is renowned for producing reliable and durable vehicles, making it difficult to choose the most durable model. However, the Mercedes-Benz G-Class stands out as the brand's longest-running model and has the reputation of being one of the toughest and most reliable cars on the market. This iconic off-roader has been around for more than four decades and has been used by the military, Hollywood stars, and everyday drivers. Because of its rugged construction and powerful engine, the G-Class can easily handle any terrain, making it the most durable Mercedes model.