Product Description: Premium Glow Plug Controller for Diesel Engines Optimize Your Diesel Engine's Performance with Our Reliable Glow Plug Control Unit Fitment: This glow plug controller is specifically designed to fit the following models: E350 (20102013) E320, GL320, ML320, R320 (20072009) ML350 (20102014) R350 (20102012) S350 (20122013) Ensure compatibility with your vehicle to achieve optimal performance. OE Number: This glow plug relay replaces part numbers A6429007701 and 6429007701. Please verify that the OE number matches the part you are replacing to ensure proper fitment and functionality. Function: The glow plug control unit is engineered to increase the air temperature in the engine cylinders, effectively reducing diesel consumption. This enhancement leads to improved engine efficiency and performance, especially during cold starts. Performance: Featuring a compact structure and high precision, this controller meets your specific needs, delivering a reliable and stable usage experience. It is designed to provide consistent performance, enhancing your vehicle's overall reliability. Perfect Fit: Manufactured according to original specifications, this glow plug controller ensures correct and easy installation. Its design guarantees a seamless fit, allowing for straightforward replacement without complications. Upgrade your diesel vehicle with this high-quality glow plug controller. Combining precise engineering, efficient performance, and easy installation, it is an essential component for maintaining and improving your engine's functionality and fuel efficiency.