Abstract: A locking mechanism having a lock and a locking bolt for the detachable fixing of a tiltable driver's cab on the chassis of a military motor vehicle. A shared joint (knee) of a knee lever, which has two one-armed lever arms of different lengths, is used as the locking element of the lock, the joint engaging with a corresponding recess of the locking bolt in the locked position of the locking mechanism. The short lever arm of the knee lever is pivotably supported on its end facing away from the knee in a fixed bearing, and the long lever arm of the knee lever is pivotably supported by its end facing away from the knee with the first lever arm of a reversing lever pivotable around a pivot axis. The second lever arm of the reversing lever is connected to a drive for pivoting the reversing lever, so that a pivot motion of the reversing lever induces a motion of the knee of the knee lever into or out of the recess of the locking bolt.