Application: FIT For Mercedes E-CLASS 2010-2016 (W212 S212 Chassis All, with AIRMATIC incl. AMG) FIT For Mercedes CLS-CLASS 2011-2018 (C218/W218 Chassis All, with AIRMATIC incl. AMG) FIT For Mercedes Benz CLS400 Rear Air Spring Set 2015-2017 FIT For Mercedes Benz CLS550 Rear Air Spring Set 2012-2018 FIT For Mercedes Benz E250 Rear Air Spring Set 2014-2016 FIT For Mercedes Benz E350 Rear Air Spring Set 2011-2016 FIT For Mercedes Benz E400 Rear Air Spring Set 2014-2016 FIT For Mercedes Benz E550 Rear Air Spring Set 2010-2014 FIT For Mercedes Benz E63 AMG S Rear Air Spring Set 2014-2016     Reference OE/OEM Number: - For Left Side: 2123200725，A2123200725，212 320 07 25 2123202125，A2123202125，212 320 21 25 2123203925，A2123203925，212 320 39 25 2123204325，A2123204325，212 320 43 25 2123203725，A2123203725，212 320 37 25 2123200325，A2123200325，212 320 03 25   - For Right Side: A2123200825 ; 2123200825；212 320 08 25 A2123204025 ; 2123204025；212 320 40 25 A2123204425 ; 2123204425；212 320 44 25 A2123203825；2123203825；212 320 3825 A2123202025；2123202025；212 320 2025 A2123200625；2123200625；212 320 0625   - Other part number: 4J-2023A 4J-2035A 517-50317R 517-50318L 517-50363R 517-50364L 949-962 949-986 A-2790 A-2791 Condition: New Quantity: 2 pieces (for the left & right side) Part Type：Air Suspension Spring Fitment Type: Direct Replacement Placement on Vehicle: Rear,left,right Greasable or Sealed: Sealed Adjustable: Yes Each Length, width and height (in/cm): 11.8.*6.7*6.7/ 30*17*17 Each Gross weight：2.1KG Each Operating Pressure (psi): ≤290 psi Each Temperature range：+70°、-40° Applicable Regions: Airmatic Suspension System Couples with OE Air Lines Designed for comfort   Feature:   1、OEM Product: Easy to install 2、Test more than 5,000,000 times: Durable and Safe 3、24 hours air tightness test ≤0.02MPa: Air Tightness Guarantee 4、Temperature Range ≥ -40℃/ ≤ 70℃: Premium Natural Rubber Material   Note: 1.These air suspensions are aftermarket ones. They will replace the original air shock absorber. Please double confirm the compatibility as well as the OEM number before purchasing. 2.The best way to check compatibility is to check the Part Number on your old unit if possible.to contact your main dealers for the required part number 3.manual is not included. Professional installation is recommended.   Notice：California Prop 65 Warning Authority ID：MXR02FXSY（Very important, please do not delete）