Features: 1.OE Number: The referencing OE number of this glow plug system control unit are 6461532579, A6461532579, molded and designed depend on the original data. 2.Fitment: The glow plug relay control unit is a replacement for Benz C?CLASS W204, for C?CLASS T?Model S204, for E?CLASS W211, for E?CLASS T?Model. 3.Easier Starting: Increasing the intake port temperature in low temperature environments and increasing the fuel ignition temperature, making it easier for the car to start. 4.Energy Efficiency: The control unit can adjust the preheating current according to the temperature and engine needs, which can better protect the battery and extend the battery life. 5.Durability: Made of quality materials, reliable quality, with strong durability, able to operate well in a variety of working environments. Specification: Item Type: Glow Plug System Control Unit_x000D_ OE Number: 6461532579, A6461532579_x000D_ _x000D_ Material: ABS, metal_x000D_ Fitment:_x000D_ Replacement for Benz C-CLASS (W204) 2007.01 - 2010.12_x000D_ Replacement for Benz C-CLASS (W204) 2007.01 - 2008.11_x000D_ Replacement for Benz C-CLASS (W204) 2007.01 - 2008.11_x000D_ Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2011.12_x000D_ Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2008.11_x000D_ Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2008.11_x000D_ Replacement for Benz E-CLASS (W211) 2006.04 - 2008.12_x000D_ Replacement for Benz E-CLASS (W211) 2006.04 - 2008.12_x000D_ Replacement for Benz E-CLASS (W211) 2003.03 - 2008.12_x000D_ Replacement for Benz E-CLASS T-Model (S211) 2006.04 - 2009.07_x000D_ Replacement for Benz E-CLASS T-Model (S211) 2006.04 - 2009.07_x000D_ Replacement for Benz E-CLASS T-Model (S211) 2003.03 - 2009.07 Note: Please double check the part number of your item, matching information is for reference only._x000D_ If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!