2 Rear Air Spring Bags 2123204325 2123200725 For CLS350 E250 E500 Pair of air suspension spring bags for rear right and left fitment on W212 S212 chassis models from 2010 to 2016 and C218 W218 chassis models from 2011 to 2018 equipped with AIRMATIC system.This set includes one air spring for the rear left and one for the rear right, designed as a direct replacement.OEM reference numbers: Rear Left: 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 Rear Right: 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 Condition: Part Type: Air Suspension Spring Fitment Type: Direct Replacement Quantity: 1 Pair (2 pieces) Sealed design with adjustable functionality.Dimensions: 30 x 17 x 17 cm (11.8 x 6.7 x 6.7 inches).Constructed from natural rubber material suitable for temperature ranges from -40°C to 70°C.Each unit undergoes over 3, 000, 000 test cycles and a 24-hour air tightness test with pressure loss not exceeding 0.02MPa.Designed for easy installation as an aftermarket replacement for air springs.