Arnott AS-3899 Air Suspension Strut - Front Left

Front Left Air Strut for Mercedes-Benz

Arnott AS-3899 is a new front left air suspension strut for select Mercedes-Benz E-Class and CLS-Class models with 4MATIC, AIRMATIC, and ADS. It replaces a worn OE strut with a new custom-tuned shock absorber, a Continental ContiTech multi-ply air spring sleeve, and USA assembly details built around long-lasting seals and precision mounting components.

Key Features

• New, not remanufactured air suspension strut
• Fits the front left position on select Mercedes-Benz E-Class (W212) and CLS-Class (W218) applications
• Air adjustable design with air ride suspension
• Hydraulic internal damper with progressive spring rate
• Includes black boot, spring isolators, and upper mounting isolator
• Features a CNC-machined top mount, heavy-duty crimping rings, and a new airline fitting
• Cross-references Mercedes-Benz OE part numbers 2123201938 and 2123203338

Product Details

The Arnott Brand Line New series focuses on replacement air suspension components built as complete assemblies rather than rebuilt units. AS-3899 follows that approach for the Mercedes-Benz E-Class and CLS-Class, combining an air spring sleeve with a tuned shock absorber to restore ride height control and road response. This part number, AS-3899, is engineered for vehicles equipped with 4MATIC, AIRMATIC, and ADS, and it is assembled in the USA using Arnott seals and hardware details specified for durability and consistent fit.

Compatible With 2010-2016 Mercedes-Benz E350, front left; 2010-2016 Mercedes-Benz E550, front left; 2012-2016 Mercedes-Benz E300, front left; 2014-2016 Mercedes-Benz E250, front left; 2015-2016 Mercedes-Benz E400, front left; 2014-2015 Mercedes-Benz E63 AMG, front left; 2014-2016 Mercedes-Benz E63 AMG S, front left; 2012-2018 Mercedes-Benz CLS550, front left; 2014-2018 Mercedes-Benz CLS63 AMG S, front left; 2015-2017 Mercedes-Benz CLS400, front left; 2014 Mercedes-Benz CLS63 AMG, front left.

Common Issues This Part Addresses

• Front left corner sagging or uneven ride height
• Air leaks from a worn air spring sleeve or airline connection
• Excessive bouncing, harshness, or reduced damping control
• Warning lights related to air suspension performance
• Loss of ride quality on Mercedes-Benz E-Class or CLS-Class models with AIRMATIC

Installation Notes and Tips

Verify the vehicle is equipped with 4MATIC, AIRMATIC, and ADS before ordering. Confirm the front left position and compare the OE part number to the cross-reference list when diagnosing suspension faults. After installation, clear any suspension fault codes and perform a ride-height calibration if required by the vehicle system.

Quality Assurance

Arnott manufactures this AS-3899 air suspension strut as a new assembly with a custom-tuned shock absorber, Continental ContiTech air spring sleeve, CNC-machined top mount, and reinforced crimping details for consistent replacement performance.