Front Air Suspensions Fit Mercedes W164 GL350 GL450:Our new front air suspensions fit for Mercedes W164 GL350 GL450 1643206113 Front Air Suspension Spring Shock Struts. The air suspension can compress the air in an elastic closed container so that it can work effectively. It also features ideal nonlinear elasticity. When added altitude controller in the air spring, the height of the car can change with load. This product 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.