Bilstein 20-255824 Suspension Shock Absorber - Rear Left

Bilstein B4 DampTronic Rear Left Shock

The Bilstein B4 OE Replacement (DampTronic) shock absorber is a direct-fit solution for electronically adjustable suspension systems on select Mercedes-Benz models. This rear left damper is built to restore original ride quality and handling while meeting OE-level standards.

Part number 20-255824 is a Bilstein Shock Absorber with a monotube internal design, black paint finish, stem upper mount, and Eye 10.1mm lower mount. It is made for drivers replacing a worn electronic rear damper on a Mercedes-Benz E550, E350, or C300 with the correct suspension package.

Key Features

• Bilstein B4 OE Replacement (DampTronic) series for electronically adjustable suspension
• Direct OE replacement for factory electronic dampers
• Monotube internal design for consistent damping response
• Rear left position fitment
• Black paint finish
• Upper mount type: stem
• Lower mount type: Eye 10.1mm
• Boot not included

Fitment Details

• Fits 2010-2017 Mercedes-Benz E550, rear left, B4 OE Replacement (DampTronic)
• Fits 2010-2014 Mercedes-Benz E350, rear left, with Appearance Package; B4 OE Replacement (DampTronic)
• Fits 2008-2011 Mercedes-Benz C300, rear left, with Electronic Suspension; B4 OE Replacement (DampTronic)

This part cross-references Mercedes-Benz OE numbers 204 320 29 30 and 207 320 29 30 for the same application.

What It Helps Restore

• Excessive rear suspension bounce or oscillation
• Uneven damping response from an aging electronic shock absorber
• Loss of original ride comfort on Mercedes-Benz E550, E350, or C300 models
• Rear-left handling instability caused by worn OE dampers
• Suspension warning symptoms related to degraded damper performance

Installation Notes

Verify the vehicle’s electronic suspension configuration before ordering, since this damper is specific to DampTronic-equipped applications. Confirm rear left placement, mount style, and model-year fitment against the vehicle’s original part number 20-255824 before installation.

Quality Assurance

Bilstein B4 OE Replacement (DampTronic) dampers are engineered to meet or exceed OE standards for factory-style ride control. Bilstein’s OE replacement line is built for restoring original suspension performance on European vehicles while maintaining the brand’s established damper quality.