The Marantec 304 Emergency Release (part number 46858) is an outside key-release kit designed for Marantec residential garage door openers. With a 33.6-inch release cable, it provides a secure, manual way to disengage the opener’s carriage from outside the garage so you can open the door by hand during a power outage or when remote access isn’t available. This OEM Marantec accessory is ideal for sectional doors on garages that do not have a separate entry door, serving as a practical replacement part or new-install upgrade for reliability and access control.
Engineered to interface with the opener’s standard emergency disconnect, the cable runs from an exterior lock cylinder through the door panel to the operator’s release lever. Typical installation places the lock on the top section of the door and requires drilling a through-hole; final routing and securement should follow Marantec’s installation instructions to avoid interference with door hardware and moving sections. After installation, test the outside release to confirm smooth disengagement and re-engagement of the trolley. Model designation: Emergency Release 304, Marantec part no. 46858, cable length 33.6 inches. Intended for residential sectional door applications using compatible Marantec operators.