What’s best truck out their for fuel ?MPG ? 6x2 unit

coiler:
If it’s a 2015 or later v4 Volvo that’s been serviced by a main dealer then the adblue faults should all be sorted. Plus all the electrical faults were sorted by then just make sure the living to parking parameter is set to no more than 4 hours or it will eat batteries.

Excuse my ignorance, but wtf does that mean?