KYB KG4727 Shock Absorber - Front

KYB Gas-a-just Front Shock Absorber

The KYB Gas-a-just KG4727 is a front suspension shock absorber built as an OE monotube replacement for select Mercedes-Benz applications. It uses separate hydraulic and high-pressure nitrogen chambers to deliver responsive damping, stable control, and a consistent ride during everyday driving.

Compatible with 1998-2002 Mercedes-Benz E320, front, and 1997 Mercedes-Benz E420, front, this Gas-a-just design is aimed at vehicles that work harder than standard commuter use. The KG4727 part number is also a direct reference point for shoppers comparing OE-style replacement shocks for Mercedes-Benz E320 and E420 front suspension service.

Key Features

• Up to 25% more damping performance than original equipment shocks
• Monotube construction separates gas and oil for fade-resistant operation and quick response
• High gas pressure improves steering response and control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Valving and components are engineered for Mercedes-Benz fitment
• Designed for vehicles with added load, towing use, or larger tires and wheels
• Dust cover included
• B-stop and R-stop included in the design

Product Details

Gas-a-just shocks are designed to restore original suspension capability while adding firmer control when demand increases. The monotube layout uses an air-free hydraulic piston area for precision and a separate nitrogen gas chamber with a floating piston for consistent pressure management. That setup helps the KG4727 maintain response under repeated suspension movement, which is important on a Mercedes-Benz E320 or E420 front suspension where steering feel and chassis control matter.

This part cross-references Monroe Shocks & Struts 39020 for the same application.

Common Problems This Shock Can Address

• Excessive front-end bounce after bumps
• Reduced steering response or loose handling feel
• Shock fade during repeated suspension compression
• Fluid leakage from worn piston rod seals
• Loss of control with heavier wheels, tires, or added vehicle load

Installation Notes and Tips

Verify compressed length, extended length, and mount style before installation. The KG4727 uses an E2(10X40) lower mount and S1 upper mount, with a 17.72 compressed length, 21.22 extended length, and 3.5 stroke length. Confirm the vehicle is a 1998-2002 Mercedes-Benz E320 front application or a 1997 Mercedes-Benz E420 front application with sport suspension and without self-leveling, as listed in the fitment data.

Inspect related suspension components such as mounts, bushings, and tires during replacement so the new shock can perform as intended. Proper torque procedures and alignment checks after service help preserve ride quality and steering accuracy.

Quality Assurance

KYB is known for OE-style suspension engineering, and the Gas-a-just line is built to match original equipment requirements while adding monotube performance characteristics. The KG4727 is designed for direct front suspension service on the listed Mercedes-Benz applications and uses a high-pressure design to support consistent damping response.