DR Airmatic part AS-0025 is a new, aftermarket Rear Right strut Air Spring assembly for the Mercedes Benz 2011 - Present G Class, M Class X166, W166  SUV with Airmatic with a new rubber air spring bladder and improvement seal Fits: 2013 - Present Mercedes-Benz GL Class X166 with Airmatic and with and without Adaptive Damping System 2011-Present mercedes Benz ML Class  W166  with Airmatic and with and without Adaptive Damping System Features: Pre-Assembled for Easy Installation Reference OE/OEM Number A1663200325 A 166 320 0325