Application Compatible for Mercedes Benz M Class W166 2011-2015 Compatible for Mercedes Benz GL Class X166 2012-2016 Specification Part / OEM Number: 1663200104 , 1663200204 , 166 320 01 04 166 320 0104 , 166 320 0204 , A1663200104 ,A1663200204 Condition:New Warranty: one year warranty for any manufacturing defect Quantity:1 piece CE certificationNotice-These shockare aftermarket ones. They will replace the original air shock. -Please doubleconfim thecompatibilityas well as theOEM numberbefore purchasing. -Instruction is not included. Professional installation is recommended. -Contact us please for whatever we can help.