One would expect that Iran has weapons to defeat the Merkava tank, since Hizbollah has already done it. I don't see how Iran is likely to enounter this tank though. I have come to believe that America is likely to attack Iran at some point and is slowly building the case. Common sense and the will of the people will be subverted as was done in Iraq. There are people who get rich from wars and there are people who get rich from oil. These are the people that will determine the direction that the nation will take.
Australian police arrest 5 over shooting 'linked to terrorism' (Reuters)
from the article: Revolutionary Guards: Iran can penetrate Israel's Merkava tanks