between the object to be fastened and the vehicle the fastening element has at least one cavity which may be changed in shape by fluid impingement such that the fastening elements fixes the object in the vehicle by shape change application_number US 74937207 A description a console 2 of a personal service unit of the arranged above the seats of passengers in a passenger aircraft is represented in fig1 at its horizontally spaced sides the console 2 is connected to a receiver frame 6 by the fastening system 4 left and 4 u2032 right fig1 shows two different fastening systems 4 of the fastening system 4 u2032 is used on each side the fastening system 4 and 4 u2032 comprises holding elements 8 and 8 u2032 respectively which are arranged in that side of the console 2 which faces the receiver frame 6 the holding elements 8 and 8 u2032 are profiled to be roughly u shaped in cross section so that first they extended downwardly with a limb on the side of the console 2 in order then to extend by 90 u00b0 into the web region lying roughly horizontally in the installation position which then in turn is bent upwardly by 90 u00b0 into the outer limb wherein the outer limb is designed essentially in a c shape so that the hook like profiles in the cross section of fig1 result holding elements 10 and 10 u2032 are also arranged on the receiver frame 6 these holding elements 10 and 10 u2032 are likewise designed as profiles which are fastened in the receiver frame.