Sorry, no auto is an "investment" and particularly not those of Euro design. After a few years on the road, these start to lose their value almost as fast as crypto due to the exorbitant maintenance costs.
What looks like a good deal on a late model "luxury" car becomes anything but once the naive new owner discovers it is due for over $10k of scheduled dealer maintenance.
The rich who buy these write them off as disposable status symbols --- not to be confused with reliable daily transportation.