Hi Brian
Visited Cordoba today and found the parking area you mentioned.
The good news is, it is very near the "old city", Mosque etc.
The not so good news is. There are no aire like facilities. The parking bays are car sized, not campervan size, but, see later. When we arrived (about midday, Monday), the parking area was deserted, except for a very beaten up Ford Transit van, and a French Campervan. There is an entry/exit barrier, and a charge of 30Cents per hour, with a maximum of 20Euro per day. Once in, you cannot exit without paying. The machine alledgely accepts credit cards, but, we used cash. There are CCTV cameras in evidence, but, we did not personally feel "comfortable" about staying there overnight. There were no signs to indicate you could or could not do so. Given that the place was empty, the small bays did not pose a problem, the French Campervan was just spanning two of them. We chose to follow "PlanB" and go to a campsite at Villafranca, with a bus service to Cordoba. I can let you know how that goes if you wish.
Regards
Ken
http://www.kenandkathleen.blogspot.com