I drove to Cordoba from AEP when there was a strike as my plane was boarding.
Make 110% that you have your headlights on at all times. I found out the hard way and i had to bribe (coima) a cop at a safety checkpoint in the middle of the pampas.
Also out in the pampas there are many washouts, or places where it goes from pavement to dirt and back to pavement without any warning.
I dont drive in Argentina unless i have to. Ill hire a car with a driver first.