Arnott A-2791 Air Suspension Spring - Rear Left

Rear Left Air Spring for Mercedes-Benz E-Class and CLS-Class

Arnott A-2791 is a rear left air suspension spring for select Mercedes-Benz E-Class W212 and CLS-Class W218 applications. It is built with a multi-ply Continental ContiTech air spring bladder, German-made crimping rings, and a high-impact resin top mount and bottom piston for a direct-fit replacement.

This Arnott NEW line part is designed, assembled, and tested in the USA. It also includes a 4 mm air fitting and a dust boot to help protect the air spring from road debris.

Key Features

• Rear left air suspension spring for Mercedes-Benz E-Class and CLS-Class applications
• Arnott NEW line replacement, part number A-2791
• Multi-ply Continental ContiTech rubber air bladder
• German-made crimping rings for secure assembly
• High-impact resin top mount and bottom piston
• 4 mm air fitting
• Dust boot included for added debris protection
• Black convoluted bellows design with standard-grade construction
• Rubber bellows material with 2.21 mm thickness
• Upper mount type: stud; lower mount type: base cup

Detailed Description

Arnott A-2791 is engineered for the rear left corner of Mercedes-Benz suspension systems that use an air spring design. It serves as a replacement air suspension spring for 2010-2016 Mercedes-Benz E300, E350, E500, E550, and E63 AMG models, plus 2013-2016 E400 and 2014-2016 E63 AMG S. It also fits 2011-2012 E250 and 2012-2016 E200 and 2014-2016 E250 applications, along with 2012-2014 CLS350 and CLS63 AMG, 2012-2018 CLS500 and CLS550, 2014-2018 CLS63 AMG S, and 2015-2018 CLS400 rear left applications.

Part number A-2791 cross-references Mercedes-Benz OE numbers 2123200325 and 2123200725 for the same application. The construction focuses on the air bladder, mounting interfaces, and piston shape to match the original suspension layout on the Mercedes-Benz E-Class and CLS-Class rear left position.

Common Problems This Part Can Address

• Rear suspension sag on the left side
• Air leaks from a worn or cracked air spring bladder
• Uneven ride height between rear corners
• Loss of air pressure in the rear suspension system
• Ride quality issues caused by aging air spring components

Installation Notes and Tips

Verify the rear left position and confirm vehicle fitment by year, model, and chassis before installation. Inspect the air line, fittings, and surrounding suspension components for wear or contamination before replacing the spring. Proper system diagnosis is important when replacing an air spring on Mercedes-Benz E-Class and CLS-Class vehicles, since compressor or valve issues can also affect ride height.

Quality Assurance

Arnott designs, assembles, and tests this air spring in the USA. The NEW line construction uses branded Continental ContiTech bladder material, German-made crimping rings, and a reinforced resin mount and piston assembly to support consistent fitment and function in rear left Mercedes-Benz air suspension applications.