Bilstein 44-257200 Air Suspension Strut - Front Left

Bilstein B4 OE Replacement Air Strut

The Bilstein B4 OE Replacement (Air) front left air suspension strut is built for Mercedes-Benz models that use factory air suspension. It restores original ride control and connects directly to the vehicle’s original connectors for a modification-free replacement. Part number 44-257200 is engineered for OE-style fitment on select Mercedes-Benz GLE, GLS, ML, and ML-Class applications.

Key Features

• Bilstein B4 OE Replacement (Air) series for factory air suspension systems
• Monotube internal design for consistent damping response
• Black painted finish
• Front left position
• Direct connection to original vehicle connectors
• Fork lower mount and special upper mount configuration
• No boot included

Product Line Details

The Bilstein B4 OE Replacement (Air) line is focused on restoring the original behavior of factory air suspension systems on many European vehicles. Bilstein supplies OE air suspension components, and this line is built to match the factory connection points and operating characteristics expected in Mercedes-Benz air suspension applications. If you are replacing a worn Mercedes-Benz GLE400 air strut or a front left air suspension strut for a GLS550, this part number 44-257200 is designed for that OE-style service role.

Fitment

• Fits 2019 Mercedes-Benz GLE400, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2016-2017 Mercedes-Benz GLE400, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2017-2019 Mercedes-Benz GLS550, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2018 Mercedes-Benz GLE550, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2016-2018 Mercedes-Benz GLE550e, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2016-2017 Mercedes-Benz GLE300d, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2015 Mercedes-Benz ML250, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2015 Mercedes-Benz ML350, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2013 Mercedes-Benz ML350, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2015 Mercedes-Benz ML400, front left, with air suspension; B4 OE Replacement (Air)
• Fits 2014 Mercedes-Benz ML350, front left, B4 OE Replacement (Air)
• Fits 2012 Mercedes-Benz ML350, front left, B4 OE Replacement (Air)
• Fits 2012-2014 Mercedes-Benz ML550, front left, B4 OE Replacement (Air)

Common Issues This Part Can Address

• Front left air strut leakage or loss of air pressure
• Uneven ride height on the Mercedes-Benz suspension corner
• Excessive bounce, harshness, or reduced damping control
• Warning lights or ride-quality complaints related to a worn air suspension strut
• Factory ride feel that has changed as the original unit aged

Installation Notes

Verify the vehicle’s front left position and air suspension configuration before ordering. This Bilstein air suspension strut is built to connect directly into the original connectors, which helps support a straightforward replacement on confirmed applications. Always confirm part number 44-257200 against the vehicle’s VIN and suspension setup, especially on Mercedes-Benz GLE, GLS550, and ML-Class models with factory air suspension.

Quality Assurance

Bilstein is an OE supplier for air suspension systems, and the B4 OE Replacement (Air) line is built to meet the standards expected for factory-style replacement on European vehicles. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.