Feature: 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 UnitOE Number: 6461532579, A6461532579 .Material: ABS, metalFitment:Replacement for Benz C-CLASS (W204) 2007.01 - 2010.12 Replacement for Benz C-CLASS (W204) 2007.01 - 2008.11 Replacement for Benz C-CLASS (W204) 2007.01 - 2008.11 Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2011.12 Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2008.11 Replacement for Benz C-CLASS T-Model (S204) 2007.08 - 2008.11 Replacement for Benz E-CLASS (W211) 2006.04 - 2008.12 Replacement for Benz E-CLASS (W211) 2006.04 - 2008.12 Replacement for Benz E-CLASS (W211) 2003.03 - 2008.12 Replacement for Benz E-CLASS T-Model (S211) 2006.04 - 2009.07 Replacement for Benz E-CLASS T-Model (S211) 2006.04 - 2009.07 Replacement for Benz E-CLASS T-Model (S211) 2003.03 - 2009.07 Package List: 1 x Glow Plug System Control Unit Note: Please double check the part number of your item, matching information is for reference only.If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!