A brake release mechanism for a spring brake actuator , in particular a parking or emergency spring brake actuator for use in a commercial vehicle, said release mechanism comprising: - a brake release bolt having a threaded portion and an operating section for operating the release bolt when inserted into a spring brake actuator , - a running nut engaging the threaded portion , said running nut being adapted to axially travel along the threaded portion in order to move a spring brake actuator piston against a force of an actuator power spring , - an indicator device comprising an indicator pin having a longitudinal axis and being at least partially accommodated in a receiving space of the release bolt , wherein the indicator device further comprises a pin actuator that is configured to move the pin relative to the receiving space along its longitudinal axis , characterized in that the pin actuator comprises a limiting element that is connected to the indicator pin , wherein the limiting element extends substantially perpendicularly to the longitudinal axis of the indicator pin , and in that a transverse guide opening is arranged in the release bolt , the transverse guide opening being configured to movably accommodate the limiting element and the movement to define a motion distance (d) of the indicator pin along the longitudinal axis along which the limiting element moves inside the transverse guide opening. - a brake release bolt having a threaded portion and an operating section for operating the release bolt when inserted into a spring brake actuator , - a running nut engaging the threaded portion , said running nut being adapted to axially travel along the threaded portion in order to move a spring brake actuator piston against a force of an actuator power spring , - an indicator device comprising an indicator pin having a longitudinal axis and being at least partially accommodated in a receiving space of the release bolt , wherein the indicator device further comprises a pin actuator that is configured to move the pin relative to the receiving space along its longitudinal axis , characterized in that the pin actuator comprises a limiting element that is connected to the indicator pin , wherein the limiting element extends substantially perpendicularly to the longitudinal axis of the indicator pin , and in that a transverse guide opening is arranged in the release bolt , the transverse guide opening being configured to movably accommodate the limiting element and the movement to define a motion distance (d) of the indicator pin along the longitudinal axis along which the limiting element moves inside the transverse guide opening. wherein the indicator device further comprises a pin actuator that is configured to move the pin relative to the receiving space along its longitudinal axis , characterized in that the pin actuator comprises a limiting element that is connected to the indicator pin , wherein the limiting element extends substantially perpendicularly to the longitudinal axis of the indicator pin , and in that a transverse guide opening is arranged in the release bolt , the transverse guide opening being configured to movably accommodate the limiting element and the movement to define a motion distance (d) of the indicator pin along the longitudinal axis along which the limiting element moves inside the transverse guide opening. <EOS>