Consecutively adding DEF fluid as needed, last refill accidentally purchased premium version of BlueDEF and worked without any issues until the last 250 miles. Began to see a new warning, “no engine restarts at 249 miles”.

Took it to the mechanic and he completely refilled the now empty tank with all regular BlueDEF.

Error on dash persists and has counted down to 1 mile, now in my driveway. What is the expected outcome? Will it not restart after one more mile and tow to Land Rover? Or will the system reset and realize it has a completely new tank of DEF?

Thanks, curious what your experiences have been.