DEF Shelf Life!
Just a quick tip for those that are new to Diesels with all of the newer emission controls. DEF apparently has a shelf life and using anything other than DEF bought from the dealer may void your warr...
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I would like to see a proven case of bad DEF. Like i said mine had a problem the first week where it said poor quality DEF and it was the pump inside the tank. They replaced the tank and all is well. It never was poor quality DEF, thats just the msg that appears. In 70k mi mine has had several brands of DEF in it. In our Mercedes they said i could even get away with running distilled water if i was unable to get DEF but would have a check engine light but no limp mode.
