H&R 29147HA1 Replacement Rear Lowering Coil Spring for Mercedes-Benz ML-Class W166

The H&R 29147HA1 is a replacement rear-axle lowering coil spring, sold as a pair, and is a component of the H&R 29147-1 lowering spring kit designed for the Mercedes-Benz ML-Class (W166) with standard (non-air) suspension. These springs deliver H&R's renowned combination of a sportier stance and optimized handling dynamics without sacrificing everyday ride comfort.

Key Features:

• Rear Axle Fitment: Designed specifically for the rear axle position; sold as a pair of two coil springs
• Constant Wire Diameter Design: Coil spring with constant wire diameter for predictable, linear spring behavior
• High-Quality Construction: Manufactured from high-tensile spring steel with protective powder coating for corrosion resistance
• Lowering Performance: Part of the H&R 29147-1 kit providing approximately 40–45 mm of lowered ride height
• Standard Suspension Compatibility: Engineered for vehicles equipped with standard (non-air, non-Airmatic) suspension
• TÜV Certified: Delivered with TÜV® certification, ensuring compliance with European safety and quality standards
• Made in Germany: Engineered, manufactured, and tested at H&R's facility in Lennestadt, Germany
• Replacement Ready: Direct replacement for worn or damaged rear springs in the H&R 29147-1 kit; replacement in pairs is recommended

Technical Specifications:

• Fitting Position: Rear Axle
• Spring Design: Coil spring with constant wire diameter
• Length: 449 mm (17.68 in)
• Diameter: 126 mm (4.96 in)
• Wire Diameter: 14.5 mm (0.57 in)
• Weight: 4.00 kg (8.82 lbs) per spring
• Quantity: 2 springs (pair)

H&R has been producing precision suspension components since 1980 and was the first manufacturer to receive TÜV certification for aftermarket lowering springs. The 29147HA1 reflects that legacy of quality, providing a direct OEM-grade replacement for drivers who want to restore or maintain their lowered H&R spring setup with confidence.