Features: Enhances your vehicle's cold start performances with the Glow Plug Controller, designed for compatibility for E320, GL320, and ML320. Featuring advanced electrical design and high quality materials, this glow plug control Relays module ensures stable and reliable operation under various conditions, improving engine start efficiency. For owners looking to replace or upgrades their glow plug control units, as well as automotive technicians seeking high quality solution for vehicle maintenance. Perfect for use in cold climates where efficient engine pre heating is essential, and for frequent short distance drivers who need quick vehicle response and reduced engine wear. With its corrosion resistant construction, this glow plug controller offers long lasting performances, making it a choice for maintaining vehicle condition and reliability. Specifications: Material: Plastic Size: About. 11.4cm/4.49in Part Number: 6429007801, 6421532079, 6429002800, 6429005801, 2110021048, 6421530379, 6421531979, 6429007801, 6429007701, 68013182AA, 5175759AB, 68013182AC, 6421532, GSE114 Applicable Model: for W204 W461 W164 W251 W221 S204 A209 X164 X204 V251 E320 GL320 ML320 R320 2500 3500 Package Includes: 1pc Glow Plug Controller note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.