I thought Iran has not yet taken delivery of any S-300 missile systems?
Israel has some interesting anti-SAM systems, including a drone that loiters in the area of interest, and attacks SAM radars whenever they switch on. Should be handy pretty soon here...
“...after failing to persuade Russia to deliver the linchpin of its air defenses, S-300 missiles.”
http://www.debka.com/headline.php?hid=6384