Disconnected DEF vent tube
I was returning home from the eclipse when the check engine light came on, followed later by the check DEF light. It took me a couple of days to get in to the shop (Kollmar's in Kent, WA-Yea!). During their check, they added DEF and noticed it leaking onto the ground. Long story short: The DEF venting tube worked itself off,and all DEF leaked out. I was down to 7 starts from 16 (did not know about that until the service). Reconnected, tested, reset software with specified 1 hour drive, no parts, and all is well. This is a 2015 Renegade Villagio with 4000 miles, has not yet been serviced. I consider myself fortunate not to have had to tow it to a Mercedes dealer. I highly recommend Kollmar for any Seattle area non-warranty Sprinter service.
2015 Renegade Villagio 25 ft Sprinter Chassis 3.0l KE6QGZ/7
"Good judgment comes from experience and experience comes from bad judgment." Nasr-al-Din