This genuine OEM fuel door release actuator is a perfect fit for your W221 Mercedes 2011 S550 S400 CL550. It is a right passenger side part with resistance tank flap locking mechanism. The item has an OEM finish and is made by Mercedes-Benz, with part numbers A2518200197 and A2218200072. This fuel door release actuator is compatible with S-Class CL-Class S CL Class Mercedes Benz MB OEM, S350 S400 S450 S500 S550 S600 S63 S65 AMG, and CL550 CL600 CL63 AMG models from 2007 to 2014. It is a superseded part number and comes as a single piece. Order now and enjoy the convenience of having a reliable fuel door release actuator.