Well if you got yourself over your head on having an expensive car like a BMW M4.......
stop being broke and pay up.....
Spare us all the, "wealthy and sophisticated BMW driver", routine. Most of those vehicles are so heavily financed, and are traded in so often, 33% of the owners are underwater on their loans. It doesn't take any brains to overpay for a car, or a battery with money you don't have. I don't know anyone who envy's someone foolish enough to abuse credit to that degree.