Overheating on 2016 A. Interstate Sprinter
Our 2016 AI Sprinter has started somewhat overheating recently. It's worst when going up hills at slow speeds, it seams to do better at highway speeds. So I think it may be an airflow problem. The radiator appears unobstructed and cooling fluid appears good. The radiator fan offers some resistance when turned by hand.It has 60 thousand miles and all service has been performed by Mercedes. When it's 70 degrees outside it takes the engine about 15 Minuts to worm up to 150. It has never gone in to the limp mode, but it's defenetly running hotter then it used to. Has anyone incountered this? Any suggestions are welcome.