I am having the same problem, almost all of the fuses and relays were not al the way in, pushed hard until they click, some were so loose you can take them out with one finger. Also have yesterday the same issue with ( Service DEF System See Dealer ) and now I have the Check Engine light on this...
I am new to Diesel, 42mpg on the highway.. not bad. And the low price of Diesel also is nice. My concern is the maintenance but also not worried because the dealer gave me “free 2 year maintenance” .