of hinges along a first trajectory or by way of a pivoting clip along a second trajectory the invention may be used for example for a variable door opening system for easy loading with bulky goods application_number US 52857805 A description the illustrations of fig1 a 1b and 1 c show a side part 10 of a motor vehicle body according to the invention having a first rear door 12 a second front door 14 and a releasable b column 16 the front door 14 is fastened to the side part 10 in the region of an a column by means of conventional door hinges and a door lock of the front door 14 engages in a locking eye 18 on the b column 16 the rear door 12 is fastened to the b column 16 in a conventional manner per se by means of two door hinges and consequently opens like the front door 14 counter to the forward direction of travel in the driving mode such an opening counter to the direction of travel has for example the advantage that the doors 12 14 can be closed by the relative wind and consequently cannot spring open unexpectedly the door lock of the rear door 12 engages in a locking eye 20 which is arranged in the region of a c column of the side part 10 as can be gathered from fig1 a 1b and 1 c an opening of the doors in the normal operation illustrated takes place in an entirely conventional.