Originally Posted by hkreck
I finally got out to check the reading on the panel for DEF but the reading doesn't come up on my 2011 after the three pushes on the M button. I usually refill it after 1000 miles, that's what the manual states.
Just checked the manual again on this given all the comments and didn't see anything about refilling or topping off other than adding at least 1.5 gal. if the low indicator lights up. But it doesn't say NOT to top off either. Nothing about a DEF level indicator on the dash screen.
DEF will freeze but the MBS has a DEF pre-heating system which allows operation at low temperatures. (P. 325) (It also has a diesel fuel pre-heating system that "improves flow properties of the diesel by approximately 46•F.)(p.
If you add DEF when it is freezing out, you need to restart the engine after filling. If DEF is added and allowed to freeze, it can take up to 60 mins. to thaw and register the new volume and "during this time the engine may only be operated in neutral." (P. 148) I assume this if you run out before refilling.
Land of 10,000 Lakes
2016 Forester MBS 2401R