Oil Filter Wrench, inside square 10 mm (3/8 inch). Spanners & Wrenches. 14-point. wrench size 74.mm. Oil Filter Wrench for the operation of oil filters and oil filter caps from Mann, Knecht and Opel. Useable for Mercedes-Benz cars since 2006, Audi cars since 12/2007, BMW cars and motorcycles new series F and K and VW since 2007 as well as any other car brands.