I recently purchased a rear ended 500l
it had been sitting for over a year and battery was totally dead.
We used jump box to start after i reset the fuel pump so car would start .
Headed home on a 400 plus mile journey and transmission would all of a sudden show in neutral and the display would say shift to n and then to d ,
this went on the whole trip probably at least 100 times.
Upon arriving home turned car off and tried to restart to see if battery had charged at all.
It had not.
I am replacing battery tommorow for sure and am hoping this problem was just related to the voltage fluctuations.
Any ideas ?