The product is a genuine Mercedes-Benz left or right rear 2nd row seat headrest for the 06-10 Mercedes W251 R350/R500 models. It is a gray adjustable headrest designed for direct replacement in the back seat of the vehicle. This headrest is suitable for the driver side or passenger side, providing a comfortable and adjustable seating option for the second row of the car. Made by the original equipment manufacturer (OEM) for Mercedes Benz, this headrest is a reliable and high-quality choice for those looking to replace or upgrade their vehicle's interior.