The U.S. unit of carmaker Fiat Chrysler Automobiles (FCA)(FCHA.MI) (FCAU.N) has redeemed senior secured notes that mature in 2019 with a total face value of $2.875 billion, a filing with U.S. market regulator SEC showed. Fiat completed the buyout of its U.S. unit last year but needs to refinance all of Chrysler’s bonds and past credit agreements before it can gain full access to the unit’s cash. After this payment, FCA still has to repay or refinance Chrysler bonds due in 2021 and renegotiate other credit agreements.