Elders may not abuse their delegated authority by taking advantage of their position or assuming lordship over the flock. Their role is to be godly examples and to use Scripture appropriately to deal with spiritual issues. And that is why there was always a plurality of elders in the NT churches, so if one elder was out of line, the others could correct him.
Do elders have the authority to teach wrong doctrine? Not just entirely wrong doctrine, but any wrong doctrine.
Do all believers have the authority to correct an elder if he is teaching wrong doctrine?