by means of which the screw 44 is tightened with a defined torque preferably between 0 4 nm and 0 8 nm in the screwed in position as the contact pressure is generated by the thread pairing 40 42 the pressing on of the seal likewise entails no particular expenditure of force during assembly this concludes the assembly at the fastening point shown in fig1 and 2 a complete decompression system not shown comprises a plurality of such fastening points and during assembly first the bolts 20 disposed in corners of the trim component 12 are pressed into the locking position in order to roughly fix the trim component 12 fine adjustment follows in the course of the second step of screwing in the screws 44 fig3 shows the disassembly of the decompression element fastening system 10 in a first disassembly step the screw 44 is rotated out of the screwed in position of fig2 into the screwed out position of fig1 in this case the resilient seal 16 expands in a second disassembly step which seamlessly follows the first step for simplifying disassembly by means of a further quarter turn of the screw 44 in the same turning direction as during the first disassembly step via the screw 44 resting in a friction locking manner against the narrowed end portion 54 a torque is transmitted to the sleeve 50 with the result that sleeve 50 and the.