Assembly comprising: a component body, and a fastening body for fastening the component body, wherein the component body can be connected to the fastening body via a bayonet closure of the assembly, wherein the bayonet closure comprises: • a bayonet projection, and • a bayonet groove, in and along which the bayonet projection can be guided, wherein the bayonet groove comprises: • an insertion portion, via which the bayonet projection can be inserted into the bayonet groove in an insertion direction, • a functional portion which extends laterally with respect to the insertion direction away from the insertion portion and opens at a distal end thereof in a locking portion for securing the bayonet projection, in which the bayonet projection can be secured in a locking position, and • a blocking portion which connects the functional portion to the insertion portion, characterized in that • the bayonet groove further comprises: a pocket portion extending between the blocking portion and the locking portion away from the functional portion counter to the insertion direction, in which pocket portion the bayonet projection can be at least partially received in a holding position, wherein the assembly further comprises a blocking element which can be selectively positioned in a blocking position in the blocking portion, in order to block a passage for the bayonet projection in the bayonet groove between the insertion portion and the functional portion, and wherein the assembly is designed such that the blocking portion is at least partially exposed in the holding position so as to position the blocking element in the blocking portion. a component body, and a fastening body for fastening the component body, wherein the component body can be connected to the fastening body via a bayonet closure of the assembly, wherein the bayonet closure comprises: • a bayonet projection, and • a bayonet groove, in and along which the bayonet projection can be guided, wherein the bayonet groove comprises: • an insertion portion, via which the bayonet projection can be inserted into the bayonet groove in an insertion direction, • a functional portion which extends laterally with respect to the insertion direction away from the insertion portion and opens at a distal end thereof in a locking portion for securing the bayonet projection, in which the bayonet projection can be secured in a locking position, and • a blocking portion which connects the functional portion to the insertion portion, • a bayonet projection, and • a bayonet groove, in and along which the bayonet projection can be guided, wherein the bayonet groove comprises: • an insertion portion, via which the bayonet projection can be inserted into the bayonet groove in an insertion direction, • a functional portion which extends laterally with respect to the insertion direction away from the insertion portion and opens at a distal end thereof in a locking portion for securing the bayonet projection, in which the bayonet projection can be secured in a locking position, and • a blocking portion which connects the functional portion to the insertion portion, characterized in that • the bayonet groove further comprises: a pocket portion extending between the blocking portion and the locking portion away from the functional portion counter to the insertion direction, in which pocket portion the bayonet projection can be at least partially received in a holding position, • the bayonet groove further comprises: a pocket portion extending between the blocking portion and the locking portion away from the functional portion counter to the insertion direction, in which pocket portion the bayonet projection can be at least partially received in a holding position, wherein the assembly further comprises a blocking element which can be selectively positioned in a blocking position in the blocking portion, in order to block a passage for the bayonet projection in the bayonet groove between the insertion portion and the functional portion, and wherein the assembly is designed such that the blocking portion is at least partially exposed in the holding position so as to position the blocking element in the blocking portion.