Bilstein 44-109479 Air Suspension Strut - Rear Left

Bilstein B4 OE Replacement (Air) Rear Left Strut

Restore factory ride quality with the Bilstein B4 OE Replacement (Air) rear left air suspension strut, part number 44-109479. This OE-style replacement is built for European vehicles that use an original air suspension setup, including select Mercedes-Benz CL550, CL600, S350, S400, and S550 applications.

Key Features

• Black paint finish
• Monotube internal design for consistent damping response
• Direct-connect replacement for the original air suspension strut
• Built for rear left placement
• Part number 44-109479 for easy identification
• Bilstein B4 OE Replacement (Air) series

Product Details

The Bilstein B4 OE Replacement (Air) line is made for drivers who want to replace a worn factory air suspension damper without changing the vehicle’s original setup. Bilstein supplies OE air suspension systems, and this replacement strut is engineered to match the original connector layout for modification-free installation and a return to the vehicle’s intended ride feel. The monotube construction supports stable damping performance, while the black painted finish provides a clean OE-style appearance. If you are searching for a Mercedes-Benz rear left air suspension strut replacement, 44-109479 is a direct-fit option for the listed applications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Addresses

• Rear suspension sag from a worn air strut
• Uneven ride height at the rear left corner
• Excessive bouncing or reduced damping control
• Loss of factory ride comfort on air suspension vehicles
• Need for an OE-style replacement on Mercedes-Benz air suspension systems

Installation Notes and Fitment

Fits 2009-2014 Mercedes-Benz CL550, rear left.

Fits 2012-2014 Mercedes-Benz CL600, rear left.

Fits 2012-2013 Mercedes-Benz S350, rear left.

Fits 2010-2013 Mercedes-Benz S400, rear left.

Fits 2007-2013 Mercedes-Benz S550, rear left, without Active Body Control.

Confirm the vehicle’s rear left air suspension configuration before ordering. This Bilstein shock absorber replacement is designed to connect to the original vehicle connectors, so the factory air suspension layout must match the listed application. For Mercedes-Benz CL550 rear left air strut replacement and Mercedes-Benz S550 rear left air suspension repair, verify part number 44-109479 against the existing unit.

Quality Assurance

Bilstein is an OE supplier for air suspension systems, and the B4 OE Replacement (Air) series is built to meet the standards expected for original-equipment replacement on the listed vehicles.