The only thing I know is that it is listed as an option on the
Sprinter at all the web sites that describe it. Dodge.com,
I was kind of thinking along the same lines but I could
not see why it cost almost $1000.
There is also an option called "Auxiliary Belt Drive". Perhaps
to power an add on device? That benefits from a high idle?
They could be more descriptive on the web site that tries
to sell these things.
But then again they are really hard to find and they have to
ship them from Germany so perhaps they will not really start
to care until they build that Sprinter plant in Georgia in
a couple of years.
Perhaps this is useful if the vehicle sometimes runs auxiliary electronics
(lights, A/C, etc.) or has a PTO (Power Take Off). Or maybe if the vehicle
needs more throttle to hold it in place (e.g. a truck on a steep hill or an
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