Front Air Suspension Strut 1663201413 Mercedes-Benz W166 Air Shock Absorber with Electronic Sensor Our front air suspension strut OE 1663201413 is high-quality aftermarket replacement air shock absorber designed exclusively for Mercedes-Benz W166 chassis. This integrated assembly consists of hydraulic damper, multi-layer reinforced air spring bellow, protective dust boot, aluminum air cylinder and built-in electronic sensor. It can seamlessly communicate and fit the vehicle