The modern Sprinter has a drive-by-wire throttle system as well as a turbo. The engine must have a certain level of RPM to spool up the turbo to add power. This is why there is a big hesitation off the line followed by a big wallop of power. The Pedal Control 2.0 interrupts and re-broadcast a new signal to the van's ECU. This allows you to adjust the throttle input electronically so that the Sprinter drives much more normally.