Enhance your vehicle's performance with the MAXGEAR Engine Crankcase Ventilation Valve, designed for select MERCEDES models including the C, CLS, CLK, E, and GLK with the powerful 3.0D engine. This high-quality valve optimizes crankcase pressure, contributing to your engine's efficiency and longevity. Constructed from durable materials such as FPM, ACM, and polyamide 6.6, it measures 140 mm in length, 80 mm in width, and 65 mm in height, ensuring a perfect fit. Compatible with OEM part numbers 6420100191, 6420100391, and more. Upgrade your engine today and experience the benefits of better ventilation and performance!