Application2010 - 2013compatible for Mercedes BenzS400With Airmatic - Front 2007 - 2013compatible for Mercedes BenzS550With Airmatic and Without 4Matic - Front 2007 - 2012compatible for Mercedes BenzS600With Airmatic and Without 4Matic - FrontSpecificationsReference OE/OEM Number: 221 320 49 13, 221 320 93 13, 221 320 9313, 2213204913, 221320491360, 221320491380, 221320491388, 2213205113, 221320511360, 221320511380, 221320511388, 2213207313, 221320731360, 221320731380, 221320731388, 2213209313, 221320931360, 221320931380, 221320931388, 2213209713, 221320971360, 221320971380, 221320971388, A2213204913, A221320491360, A221320491380, A221320491388, A2213205113, A221320511360, A221320511380, A221320511388, A2213207313, A221320731360, A221320731380, A221320731388, A2213209313, A221320931360, A221320931380, A221320931388, A2213209713, A221320971360, A221320971380, A221320971388A22132098132213200038 A2213200038A2213205213A2213207413 A2213209713A2213209913 2213205213 2213207413 Platform: W221 Model: S Class Condition: Brand New Placement on Vehicle: Front left or right Quantity: 1 piece (for front left or right side) Warranty: one year warranty for any manufacture defectNotice- These air suspension springs are aftermarket ones.They will replace the originalair spring.Please double confim the compatibility as well as the OEM number before purchasing. - Instruction is not included. Professional installation is recommended. - Please feel free to contact us for whatever we can help.