Fitment: For E-CLASS W212 E300 for Cdi 2011 2012 2013 2014 2015, for more applicable models and years, please refer to the "Product description" Fuel Return Path Guidance Design: This fuel return hose pipe is designed to support a structured return pathway within the vehicle fuel system. It helps define a clear route for returned fuel movement, contributing to more organized internal routing behavior during engine operation Engine Bay Return Channel Arrangement: The car fuel return line tube assists in arranging the return channel within the engine bay system. It helps maintain a consistent directional layout for fuel return flow, supporting clearer internal pathway structure during normal vehicle use conditions Return Flow Stability Support Function: This engine fuel drain hose is designed to support stable return flow movement within the fuel system loop. It helps maintain steady internal routing behavior, contributing to more uniform return performance across repeated engine operating cycles Internal Fuel Path Structuring Layout: The vehicle fuel routing pipe supports structured organization of internal return pathways. It helps define a clearer directional layout within the fuel system, contributing to more orderly circulation structure during everyday engine operation, Manufacturer: MKVAXR Store