KYB KG4739 Shock Absorber - Front

KYB Gas-a-Just Front Shock for Mercedes-Benz C-Class

The KYB Gas-a-Just KG4739 is a front suspension shock absorber built as an OE-style monotube replacement for select Mercedes-Benz C-Class models. It is engineered to restore original ride control while adding quicker response for vehicles that carry extra load, tow, or run larger wheels and tires.

Gas-a-Just Product Line

KYB Gas-a-Just shocks use a monotube design with separate hydraulic and high-pressure nitrogen gas chambers. That layout supports consistent damping, fade-resistant operation, and fast response when steering input or road conditions change.

Key Features

• Part number KG4739
• Front suspension shock absorber for select Mercedes-Benz C230, C280, and C220 applications
• Up to 25% more damping performance than original equipment shocks
• High-pressure monotube construction separates gas and oil for consistent response
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure improves steering response
• Supports electronic safety systems by helping suspension behavior stay close to manufacturer intent
• Lower mount type: E2(10X40); upper mount type: S1
• Dust cover included; B-stop and R-stop included

Detailed Description

KYB KG4739 is designed for 1994-2000 Mercedes-Benz C280 front, 1994-1996 Mercedes-Benz C220 front, and 1997-2000 Mercedes-Benz C230 front applications with no sport suspension and excluding self-leveling setups. The monotube design uses an air-free hydraulic working area for control and a separate nitrogen gas chamber for immediate damping response, making it a practical OE replacement for restoring front-end stability and ride quality. This part cross-references Monroe Shocks & Struts (e.g., 39013) for the same application.

What It Helps Address

• Excessive front-end bounce after bumps
• Reduced steering response during lane changes or cornering
• Shock fade from repeated road impacts
• Ride instability on heavier wheels and tires
• Fluid leakage related to worn piston rod sealing surfaces

Installation Notes and Fitment

• Fits 1997-2000 Mercedes-Benz C230, front; recommended OEM replacement; w/o sport suspension; exc. self leveling; Gas-a-just
• Fits 1994-2000 Mercedes-Benz C280, front; recommended OEM replacement; w/o sport suspension; exc. self leveling; Gas-a-just
• Fits 1994-1996 Mercedes-Benz C220, front; recommended OEM replacement; w/o sport suspension; exc. self leveling; Gas-a-just
• Verify mount style, compressed length, extended length, and stroke length before installation
• Inspect related suspension components for wear before replacing the shock absorber
• Front suspension service should be completed with the vehicle properly supported and aligned after installation if required by the repair procedure

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacements to help maintain the handling and safety-system behavior expected by the vehicle manufacturer. Part number KG4739 is built for consistent damping control and long-term front suspension performance in the specified Mercedes-Benz C-Class applications.