The Marantec 304 Emergency Release (98.4 inches), part number 76019, is an OEM cable-actuated disconnect designed for Marantec trolley-style garage door openers. In the event of a power outage or operator fault, this assembly lets you mechanically decouple the opener from the door so the door can be moved by hand. With a cable length of 98.4 inches (approximately 2.5 m), it provides ample routing from the operator carriage to an accessible point on or near the door. This replacement part is commonly used in residential applications where an external or remote manual release is needed, and it is frequently paired with Marantec sectional-door operators, including many Synergy and Comfort series models; always verify compatibility in your opener’s manual or parts list.
This is a mechanical accessory—no programming is required—and installation typically involves securely routing and anchoring the cable between the operator’s release mechanism and the chosen access location, which may require drilling per the manufacturer’s instructions. For garages without another entry door, local codes often require an outside-access emergency release; pair this cable with an appropriate keyed release lock if external access is needed (sold separately, depending on model and region). Use only on a properly balanced door and keep clear of moving components when the system is disengaged. Professional installation is recommended to ensure safe operation and correct cable routing. Keywords: Marantec 304 emergency release cable, 76019, 98.4 inch cable, garage door opener emergency disconnect, OEM replacement for Marantec Synergy/Comfort sectional door operators, residential garage door accessory.