Bilstein 20-109097 Air Shock Absorber - Rear

Bilstein B4 Rear Air Shock for Mercedes-Benz CLS550

Bilstein B4 OE Replacement (Air) shock absorber 20-109097 is built for rear suspension service on select Mercedes-Benz CLS models. It restores the original air suspension feel with a direct-connect design that matches the vehicle’s factory connectors and mounting points.

For drivers searching for a rear air shock absorber for Mercedes-Benz CLS550 or CLS500, this Bilstein B4 OE Replacement (Air) unit provides an OE-style solution for factory air suspension repair.

Key Features

• Bilstein B4 OE Replacement (Air) series for factory-style suspension service
• Rear air shock absorber for select Mercedes-Benz CLS applications
• Monotube internal design for consistent damping response
• Direct connection to original vehicle connectors
• Black paint finish with black straight boot
• Upper stem mount and lower eye 10mm mount
• Part number 20-109097 for ordering and cross-reference

Product Details

Bilstein’s B4 OE Replacement (Air) line is aimed at replacing original air suspension dampers on many European vehicles. As an OE supplier for air suspension systems, Bilstein builds this rear shock absorber to meet factory expectations for fit, function, and ride quality. The monotube construction supports controlled damping, while the direct-fit connector layout helps preserve the original suspension setup on Mercedes-Benz CLS550 and CLS500 rear applications. This part number 20-109097 is a practical choice when servicing factory air suspension components without changing the vehicle’s original configuration.

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

What It Helps Address

• Rear suspension sag or uneven ride height on air-equipped Mercedes-Benz CLS models
• Excessive bouncing or reduced damping control
• Air shock wear that affects ride comfort and stability
• Factory connector or mounting replacement needs during suspension repair
• Restoration of OE-style rear suspension feel

Installation Notes

Fits 2007-2011 Mercedes-Benz CLS550, rear. Fits 2006 Mercedes-Benz CLS500, rear. Verify the vehicle’s rear air suspension configuration, connector style, and mount type before installation. Use the original mounting points and electrical/air connections as equipped on the vehicle. Part number 20-109097 is intended for direct replacement on the listed applications.

Quality Assurance

Bilstein supplies OE-level air suspension components, and the B4 OE Replacement (Air) series is engineered to meet the standards expected for factory replacement service on European vehicles.