Bilstein B4 OE Replacement Air modules, air bags, and gas pressure shock absorbers are designed to replace the original air suspension systems on many Mercedes-Benz and Jaguars. As Bilstein is the OE supplier for these items, you can rest assured that the quality of these products meets, and typically exceeds, the standards set forth by the vehicle's manufacturer. Each B4 Air product is designed to connect directly into the original plugs on the vehicle, ensuring modification-free installation and restoration of the original feel of the vehicle.