Forum Discussion

precioustime's avatar
precioustime
Explorer II
Dec 08, 2014

Anyone having DEF fluid problems in a MB diesel RV?

During the first 12,000 miles on my 2014 RV with a MB diesel engine and a Sprinter chasis I have stopped in 5 different MB dealers while traveling with my wife and 2 dogs. The DEF fluid light comes on...
Class C
Butch50's avatar
Butch50
Explorer
Dec 09, 2014
I was just reading on one of the Sprinter forums about this same thing and the DEF had crystalized on the feed port in the tanks. They replaced that and it fixed the trouble. Might make the suggestion at the dealer when you take it in.

I wonder if letting the rig set without or low DEF in it and the it evaporates and leaves the crystals behind?

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