I'm looking at buying a 2014 Dodge Ram 1500 Laramie 3.0l Ecodiesel. I have no knowledge of diesel engines. Especially DFE. The truck has 113,002 miles. Will I be getting a good truck? Is it difficult to maintain the DFE stuff. What do I need to know? I love the truck but if I'm just gonna have lots of problems I'll buy a different truck. TIA!