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On my F350 Powerstroke, I would download the OE program, then upload the new tune. When I returned for service i would upload the OE program. As long as you put the truck back to OE, the handheld was free to work with any other truck. In fact I sold the device for 75% of what i paid. It's unfortunate that these handhelds for the Euro cars don't behave the same.
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