Febi Bilstein Seal Ring Between Power Steering Fluid Reservoir and Pump (106602). This product is designed to be used as originally intended and not modified for purpose. Please ensure the products are installed by a competent individual. N.B. products are usually supplied without fitting instructions. Compatible with the following OEM references: MERCEDES-BENZ 0004661780, 0004661880, A0004661780, A0004661880.