Air Suspension Repair Kits Fit Mercedes W211 CLS E-Class. This air spring bag is new and fits the right of vehicle model Mercedes CLS E-Class. In the areas of safety, accuracy, durability and quality, this product is like the original spare part. The air suspension can compress the air in an elastic closed container so that it can work effectively. It also features in ideal nonlinear elasticity. When added altitude controller in the air spring, the height of car can change with load. This air spring is constructed with high quality material, you can use it for a long time. While when you are ready to install it, professional assembly is highly recommended. Material: Copper.