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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
precioustime's avatar
precioustime
Explorer II
Dec 08, 2014
donn0128 wrote:
Bad or stale DEF can cause this. Where did you fill the DEF tank and how old was the fluid?
The DEF fluid was from various auto parts stores. It is a mechanical problem not a DEF fluid problem. Pumps have been changed, wires have been changed, computer specs have been changed-you name it!

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