aFe 31-10250 Magnum FLOW Pro Dry OE Replacement Air Filter for Mercedes-Benz C/E/ML-Class V6-3.5L Engine Pro Dry S 'Oil-Free' Media for maximum convenience, OE Direct Replacement for simple performance upgrade, 3-Layers Of Progressively Finer Porosity Synthetic 'Oil-Free' Media for great filtration efficiency Washable and Reusable Air Filter provides long service life, Made from 100 percent 55 Shore 'A' Polyurethane for durability 20 mm round, evenly spaced pleats for excellent airflow, Progressive Bump Seal Design requires no sealing grease or gasket Expanded Metal Insert prevents filter collapse, Drop-in fitment for hassle-free installation Manufactured and assembled in the USA