More on the DEF and CEL (check engine light). We got to Tampa before we found a Sprinter tech. The dealer we saw ( Crown Euro cars) indicated that the DEF issue was likely related to freezing of the DEF fluid in the cold Ontario winter temps, but the CEL was a more serious problem. He indicated there was an entire task force at Mercedes-Benz Germany dealing with the issue. He indicated some of the sprinters they had dealt with had been stuck in service bays for weeks to get the problem resolved. It seems to be related to the NOx sensors before and after the particulate filter and trouble with the software for the DEf injection system (SCR, selective catalytic reduction). They replaced the two sensors, cleared our codes and we haven't had a had a problem since. Crown even washed the motorhome and asked us to check back the following week before heading home to make sure there were no problems on our return trip. I can't say enough about how well they treated us. Adam, their tech, was very personable, courteous and helpful.
Just thought others may want to hear about this issue and see if its a problem in our community...
Ottawa Ontario Canada
2015 Solera 24R