The invention relates to a motor vehicle door lock, particularly a motor vehicle bonnet lock (3), provided with a locking mechanism (4, 5) which substantially consists of a rotary latch (4) and a pawl(5). The locking mechanism (4, 5) interacts with a striker element (6) on a bonnet (2). The lock according to the invention further has an unlocking/opening mechanism (10, 11) for the bonnet (2), which mechanism is equipped with a release element (10) provided in the interior of a motor vehicle body. It is required to operate the release element (10) preferably twice to open the bonnet (2). According to the invention, the locking mechanism (4, 5) is transferred to a pre-latched position after the release element (10) has been operated at least once, with the striker element (6) still being trapped. The bonnet (2) is opened from said pre-latched position by a movement in its longitudinal direction.