I’ve driven with the rear window hatch open several times. I get the warning. I hit OK on the steering wheel and the driver’s display says the warning is temporarily deactivated, no more fuss.
Have had mine on the west side of Houston. Haven’t seen mine that bad since taking possession in August. I was getting 15.8 around Houston. Took two road trips since mid November with the rig weighted up and I’m down to 15.4 at 7000 miles. The last trip (Houston to GA on Friday) was >900 miles...