I recently bought a 2011 sprinter 2500 170 ext. It had 101, 000 when I received it. I have put 12, 000 miles on this and have had good luck with it UNTILL the I had to replace the dpf filter. The internal core of the filter shattered making it scrap. Then after spending $3000. on a new filter all my def lines plugged...another $1100. Now the def heater went and the def light is back on. Looks like buying a used sprinter is not a good idea and the projected repair this time is another $3300.