The system includes a bracket, a handle pivotally mounted about a handle axis and including a main gripping branch and a secondary branch each extending on either side of the handle axis, a safety device configured to block an ejection of the handle towards its open position in the event of an impact. The device includes a blocking pawl elastically biased into a position of blocking the pivoting of the secondary branch according to a handle ejection direction and at least one lever for releasing the secondary branch in the ejection direction, the release lever being configured to drive the pawl, against its elastic biasing force, into a release position of the secondary branch, consecutively to a manual mechanical action of pushing in the handle from its flush position and/or to the triggering of an electric actuation for ejecting the handle from its flush position.