Well, as far as i know, 12 Panhards were sent to the Falklands, 8 of them being part of the Destacamento de Exploraci?n de Caballer?a Blindada 181 (Scout Cavalry) and the other two belongs to Escuadr?n de Exploraci?n 10 (Scout Squadron No10). All vehicles were stationed near "Sapper Hill", well protected from British naval attacks.
I can confirm they took part of the battles near the end of the war. Nearly all of them were "static". The Argentine Forces were short of fuel, and the fuel was used to supply Radars and AA Guns. Since the British Forces attacked mainly at night, Panhards were unable to support Argentine troops because of the lack of NV systems, and since they were static, they were used as "Artillery platforms" to support the Argentine retreat.
They suffered from counter-artillery, two Panhards in particular suffered from these Artillery attacks, one of their crew members got wounded and both vehicles were put out of action and were not repaired by it's crew because of the lack of tools.
As the British Forces came closer and closer, the Panhard united decided to destroy their own vehicles and surrender to the British.
They were not used as mobile forces because of the terrible ground, they were pretty much limited to traveling on roads, but the British AT Missiles could easily knock them out so they were left as static "bunkers".