<p>The invention relates to a lock for a motor vehicle having a locking mechanism comprising a rotary latch, a main latching pawl and preferably a preliminary latching pawl for latching the rotary latch. The preliminary latching pawl can engage in a preliminary latching element of the rotary latch. The main latching pawl can engage in a main latching element of the rotary latch. Moreover, there is a blocking lever for blocking the main latching pawl. The blocking lever is spring-mounted in order to ensure smooth running.</p>