Aerosus air springs replace the original Mercedes air springs of your vehicle & offer you maximum ride comfort with high durability. Security, accuracy & quality of the product match the original part. This brand new rear air spring fits both left & right side of Mercedes-Benz E-Class W211 AMG vehicles. Please kindly notice that those air springs must be replaced in pairs. The air spring has an integrated solenoid valve. It also features high-strength crimping rings & a custom-designed tapered piston for a comfortable ride. The air tank, which is attached to the original part, has been eliminated in the design of this product, which simplifies the installation process. Aerosus suspension air bags are made from high-quality elastomer materials & covered by a 2-year limited warranty & a 30-day money back guarantee. The rings on the air springs are crimped using a special technology for dependable operation & leak-free performance. They are known for their superior dynamic properties as well as their long life & reliable durability. Our air springs keep your vehicle level, even when carrying an uneven load. This means more effective handling & braking even in tough road & heavily loaded conditions. Features OE-quality air spring Maximum ride comfort High-quality OE-specified raw materials Airline Fitting Integrated Air Tank Security & durability Safe load carrying capacity & stability Easy installation Thousands of satisfied customers worldwide