Sparks to Fremont is an excellent test run for these trucks. Up mountains, down mountains, hot, cold, rain, snow, ice, open roads and city traffic.
This is real world testing, rather than doing laps on a test track. I drove for a few decades and would "almost' volunteer for this testing.
Semi Truck sales might be a good place to bring back the referal program. After the lower margin fleet sales, the independent operator should be a higher margin group.
Having the drivers give rides, demos, and talking on the radio all day could be a very fruitful maketing approach. As for Daimler, they would just move production to Mexico. Just ask the folks in Kelowna and Portland.