
The Story
Reliable Air Suspension Spring for Mercedes-Benz Vehicles
The Bilstein 40-303437 air suspension spring is designed to restore the original ride quality and handling of your Mercedes-Benz CLS400, CLS550, E350, or E400. Engineered to meet OE specifications, this black-painted air spring offers a durable and precise fit for your vehicle's suspension system.
- OE replacement air suspension spring for Mercedes-Benz models
- Durable black paint finish for corrosion resistance
- Part of the B3 OE Replacement (Air) series by Bilstein
- Compatible with CLS400, CLS550, E350, and E400 models
- Part number 40-303437 ensures exact fitment and performance
About the B3 OE Replacement (Air) Product Line
The B3 OE Replacement (Air) series by Bilstein focuses on providing high-quality air suspension components that meet original equipment standards. This product line is designed to offer a direct replacement for factory air springs, ensuring consistent ride height, comfort, and handling characteristics. The 40-303437 air suspension spring is part of this series, delivering reliable performance for Mercedes-Benz vehicles equipped with air suspension systems.
Product Details and Specifications
The Bilstein 40-303437 air suspension spring features a robust black paint finish that helps protect against corrosion and wear. It is engineered specifically for Mercedes-Benz CLS400, CLS550, E350, and E400 models, ensuring precise fitment and compatibility. This air spring is designed to maintain the vehicle's original ride height and suspension dynamics, contributing to a smooth and controlled driving experience.
Common Applications and Problem Resolution
- Restores proper ride height and suspension balance
- Replaces worn or leaking air suspension springs
- Eliminates uneven or sagging suspension issues
- Improves vehicle handling and stability
- Addresses air suspension warning lights related to spring failure
Installation Notes and Tips
Installation of the Bilstein 40-303437 air suspension spring should be performed by a qualified technician familiar with air suspension systems. Proper handling and care are essential to avoid damage to the air spring during installation. Ensure all air lines and fittings are securely connected and check for leaks after installation. Refer to the vehicle’s service manual for specific torque specifications and procedures.
Quality Assurance and Warranty
Bilstein manufactures the 40-303437 air suspension spring to meet stringent quality standards, ensuring durability and reliable performance. The product undergoes rigorous testing to comply with OE specifications. Warranty details are provided by Bilstein and should be confirmed at the time of purchase.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Reliable Air Suspension Spring for Mercedes-Benz Vehicles
The Bilstein 40-303437 air suspension spring is designed to restore the original ride quality and handling of your Mercedes-Benz CLS400, CLS550, E350, or E400. Engineered to meet OE specifications, this black-painted air spring offers a durable and precise fit for your vehicle's suspension system.
- OE replacement air suspension spring for Mercedes-Benz models
- Durable black paint finish for corrosion resistance
- Part of the B3 OE Replacement (Air) series by Bilstein
- Compatible with CLS400, CLS550, E350, and E400 models
- Part number 40-303437 ensures exact fitment and performance
About the B3 OE Replacement (Air) Product Line
The B3 OE Replacement (Air) series by Bilstein focuses on providing high-quality air suspension components that meet original equipment standards. This product line is designed to offer a direct replacement for factory air springs, ensuring consistent ride height, comfort, and handling characteristics. The 40-303437 air suspension spring is part of this series, delivering reliable performance for Mercedes-Benz vehicles equipped with air suspension systems.
Product Details and Specifications
The Bilstein 40-303437 air suspension spring features a robust black paint finish that helps protect against corrosion and wear. It is engineered specifically for Mercedes-Benz CLS400, CLS550, E350, and E400 models, ensuring precise fitment and compatibility. This air spring is designed to maintain the vehicle's original ride height and suspension dynamics, contributing to a smooth and controlled driving experience.
Common Applications and Problem Resolution
- Restores proper ride height and suspension balance
- Replaces worn or leaking air suspension springs
- Eliminates uneven or sagging suspension issues
- Improves vehicle handling and stability
- Addresses air suspension warning lights related to spring failure
Installation Notes and Tips
Installation of the Bilstein 40-303437 air suspension spring should be performed by a qualified technician familiar with air suspension systems. Proper handling and care are essential to avoid damage to the air spring during installation. Ensure all air lines and fittings are securely connected and check for leaks after installation. Refer to the vehicle’s service manual for specific torque specifications and procedures.
Quality Assurance and Warranty
Bilstein manufactures the 40-303437 air suspension spring to meet stringent quality standards, ensuring durability and reliable performance. The product undergoes rigorous testing to comply with OE specifications. Warranty details are provided by Bilstein and should be confirmed at the time of purchase.
















