All DEF is the same, but not all DEF systems are the same.
Beginning in 2010 diesels, DEF is required but the monitoring systems have evolved and there are problematic issues with various years and chassis manufacturers. This is just a note to be sure you investigate the DEF system on whichever coach you consider, based on year of engine and chassis manufacturer. Most difficulties are with 2016 and newer diesels.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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