the vehicle front such as footsteps headlight units and panels at predetermined non adjustable positions with the beam structure and the supported components together forming a front module application_number US 60506803 A description in fig1 and 2 reference numeral 1 refers generally to a heavy vehicle which in the example shown takes the form of a towing vehicle for a trailer the vehicle 1 is in a traditional manner equipped with a cabin for the driver 2 and is furthermore according to the invention equipped with a continuous lower front module 3 comprising a forward underrun protection the front module 3 in the embodiment shown comprises a number of components such as an integrated force absorbing beam structure 5 two foot steps 6 two headlight units 7 and a number of panels which form a bumper casing 8 in fig2 the front module 3 is shown separately in front of the driver 39 s compartment 2 in a position when it has not yet been assembled on the vehicle 1 it will become apparent that the front module 3 according to the invention is pre assembled into one unit with among other things the purpose of facilitating the assembly of the details comprised in it of the vehicle 1 and in order to as will be explained later to give the comprised components already from the beginning an exact positioning relative to the rest of the vehicle front the components of the module and their limiting edges and surfaces will thus after being arranged on the vehicle will have an acceptable fit as regards connections and space widths relative.