Advanced RV is communicating a decision by Mercedes Benz to discontinue building the super tall Sprinter effective June, 2016. See the link: SuperStealth: Last Call - Advanced-RV
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A 2014 Ocean One MB Sprinter by Advanced RV named "Imagine"
Here's hoping some other manufacturer steps in to fill the gap. Until then, it looks like a Class B+ or Class C is the only way to get an interior height like the super high roof had.
The high roof Transit has 3.7 inches more interior height than the high roof Sprinter, the super high roof Sprinter is almost 8 inches higher than the high roof Sprinter...