They say Porsche on them.Who is the manufacturer of the bars mounted on your Macan's roof rails? They may not be Porsche bars.
That would likely determine the type of tool required to dismount these bars from the rails.
It requires a key that the owners didn’t provide.Here's an illustration of various fastener heads. If it uses Allen screws/bolts (fifth down in the left column), then an Allen key would suffice:
Torx? Torx fasteners are more popular on newer vehicles.
Only items with locks are the cross bars - no locks on the rails.Kat, Your terminology is confusing. When you say 'rail' I am hearing roof bars. Please take a picture of what you are calling 'rails'.
I think the fastener holding the cross bars is hex but it really doesn't matter since to access the fitting you need a key to unlock the cover to access it. Best bet is probably the dealer or a locksmithHere's an illustration of various fastener heads. If it uses Allen screws/bolts (fifth down in the left column), then an Allen key would suffice:
Torx? Torx fasteners are more popular on newer vehicles.
Only items with locks are the cross bars - no locks on the rails.