KYB KG4726 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Mercedes-Benz E420

The KYB Gas-a-Just KG4726 is a rear suspension shock absorber built as an OE-style monotube replacement for the 1997 Mercedes-Benz E420 with sport suspension, excluding self-leveling. It is engineered to restore original ride control while adding quicker response for heavier-duty driving conditions.

For Mercedes-Benz E420 rear suspension service, this KYB Gas-a-Just shock uses a high-pressure monotube design that separates gas and oil for consistent damping and fast reaction to road inputs. The KG4726 is a direct-fit option for drivers replacing worn rear shocks on a 1997 Mercedes-Benz E420.

Key Features

• Monotube shock absorber designed as an OE replacement
• Adds up to 25% more damping performance over original equipment shocks
• Separate gas and oil chambers for fade-resistant operation
• High-pressure nitrogen gas supports instant response and improved steering feel
• Triple chrome plated piston rod helps reduce seal wear
• Built for vehicles that work, tow, or use larger, heavier tires and wheels
• Includes dust cover, B-stop, and R-stop
• Lower mount type: E2(10X40); upper mount type: S1

Product Details

KYB Gas-a-Just shocks are part of the Gas-a-Just line, which focuses on monotube construction for controlled damping and consistent performance. The KG4726 uses an air-free hydraulic piston and valve area paired with a separate high-pressure nitrogen gas chamber, helping maintain ride comfort during normal driving while delivering firmer control when conditions demand it. This makes it a practical rear shock choice for the Mercedes-Benz E420 when restoring suspension response and stability.

This part cross-references Monroe Shocks & Struts (e.g., 39021) for the same application.

Common Problems This Shock Can Address

• Rear-end bounce or excessive body movement over bumps
• Reduced damping control from worn original shocks
• Slow steering response linked to tired suspension components
• Ride fade during repeated suspension loading
• Seal wear and fluid leakage from aging shock absorbers

Installation Notes

Compatible With 1997 Mercedes-Benz E420, rear, recommended OEM replacement; w/ sport suspension, excluding self-leveling. Verify mount style and suspension configuration before installation. The KG4726 part number should be matched to the vehicle’s rear shock application and existing hardware layout.

Quality Assurance

KYB designs Gas-a-Just shocks with application-specific valving and monotube construction to support OE-level suspension function on the Mercedes-Benz E420. The KG4726 is engineered to restore controlled rear suspension performance while maintaining consistent damping characteristics under normal and demanding driving conditions.