1、OE Number: The referencing OE number of this glow plug control unit relay are A6461532579, 0522120202, GSE110, which is molded and designed depend on the original data, and maintaining the original car model. 2、Fitment: The glow plug relay unit is a replacement for Benz C‑CLASS (w204) C200 CDI, replacement for Benz E‑CLASS (w211) E200 CDI, replacement for Benz E‑CLASS T‑Model (s211) E200 CDI. 3、Enhanced Vehicle Performance: The glow plug system control unit module helps enhance your vehicle's performance by regulating the power supplied to the glow plugs, ensuring efficient combustion and smooth starts. 4、Regulates Power: The control unit is responsible for regulating the power supplied to each glow plug, ensures they reach the right temperature at the right time, helps the engine to start more efficiently. 5、Ideal Replacement: Direct replacement installation, meets or exceeds OEM standards for the replacement of old and damaged one on original vehicles.