One of the most unpleasant problems that the owners of Renault Megane III have with diesel engines-the beige filter. This is because, during the operation of the vehicle, the filter is amused by particulate matter that should be ignite. The engine control unit shall be given a command, but a high temperature is required in the exhaust system. This temperature is possible only during a long running car at a high speed. Thus, the less often the driver goes at a high speed on the track, the faster the particulate filter is scored.