Fuel management in commercial vehicles is mainly governed by fuel preparation, i.e., filtration and water disposal. The trend toward a so-called world engine, or engine platform for use in every region of the world, gives rise to considerable technical challenges. On the one hand, the engine must meet the partly strict exhaust gas legislation, which leads to a high level of technological advancement. On the other hand, it is this sophisticated level of technology that is confronted with different biofuel shares and fuel quality levels. It is therefore necessary to enable optimal separation of contaminants and water even under these conditions.