There is actually a lack of parking at EZE. They use one of the inactive runways to park aircraft during the turn around. Those are usually foreign aircraft parked there.

The Aerolineas stuff is the stuff you see on the road out of the airport towards BA.

Last i heard they were doing renovations to the aprons to open that runway again.

I am in the aviation maintenance business and got a tour of the Aerolineas hangars a few months back. It was interesting.