This Sticky now has more than enough practical information to help those new to DEF Sprinters.
Feel free to take government regulations and other issues to another thread.
The Sticky is closed. Thanks goes to all who contributed up to now.
vic
Added: (With supporting quote and documentation link.)
The 10 start design was chosen by Mercedes, not ordered.
EPA Documentation.
https://iaspub.epa.gov/otaqpub/display_file.jsp?docid=16677&flag=1
Select text.
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"
While EPA will not prescribe a specific driver
inducement design necessary to meet our acceptance criteria, we believe the examples
below could satisfy our objective for driver inducement designs."
"Another way to make sure vehicle operators are adding reducing agent when appropriate
is to have vehicle performance degraded in a manner that would be safe but would be
onerous enough to discourage the user from operating the vehicle until the reducing agent
tank was refilled. The key challenge of this approach is to determine what would
constitute an acceptable performance degradation strategy. A degradation approach which maintains vehicle or engine compliance with the emissions requirements helps address this concern. Additionally, use of this approach in combination with another system could be more appropriate."
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