Daimler AG says its truck business is returning to Iran as Berlin and Tehran look at restoring economic ties after a landmark deal to curb Iran's nuclear activities led to the lifting of sanctions. Stuttgart-based Daimler announced Monday that it had signed letters of intent with local partners Iran Khodro Diesel and Mammut Group to arrange a "comprehensive re-entry" into the country where Daimler started doing business in the 1950s.