The Sprinter 4×4 has served us well over the past 5 years. The build has paid off and there is not much that we would do different the next time. The only real disappointment was the 260AH AGM Beaut battery. It could not stand the cold and had trouble supplying enough power to use our Nespresso machine. Once we replaced it with the Optima Blue tops (2 x 75AH) we did not have that problem anymore. They keep on going. The only problem is that 150AH is not really a lot of capacity. We intend to switch to a 200AH LifePO4 Lithium battery in the future (with an internal heater).