I have put carpet down the sides of my garage and an old sunbed cushion across the cabinets at end of garage but its still quite nerve wracking.
I have done some measuring and I think that the max width I can get in my garage and still get out of car is 180cm which almost certainly means that the next gen Z4 (if there is one) wont be for me as I will not leave it outside as at least 2 cars in my road have been broken into , that being said the list of cars that will fit is quite small and the ones I would have even smaller