An exterior rearview mirror has a mirror head carrier and a mirror connected to the mirror head carrier. A cover is slipped onto the mirror head carrier. A spring secures the cover to the mirror head carrier in an unstressed position of the spring. The spring has at least one locking member and the cover has a counter locking member, wherein the at least one locking member engages the counter locking member to secure the cover at the mirror head carrier. The spring has a securing latch securing the spring in an elastically compressed position, wherein the spring in the elastically compressed position releases the cover.