Even then, that doesn’t sort the problem that you’re installing it in a leasing car. I’m not quite sure how cool MB would be by you voiding the warranty.
You’d also need to uninstall them eventually, since you probably wouldn’t want to leave the expensive aftermarket speakers in there for the next guy – and they might not fit the next car.
It’s just all around not a good idea for a 3 year lease. At least in my opinion.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.