Front end for a car and his assembly process

The front face has a transversal part (2) including vertical projections (8A, 8B) placed under a plane surface (6), where the projections have respective anti-tilting bearing surfaces (10A, 10B). Another part (12) forming support of an outer flat-face cowl (14) presents vertical struts (18A, 18B) contacting the surfaces (10A, 10B). The part (12) is integrated to the part (2) in support zones (20A, 20B) along the surfaces (6, 10A, 10B). An independent claim is also included for a method of assembling a front face of a motor vehicle.