Arnott AS-3156 Air Suspension Strut - Front Left

Front Left Air Strut for Mercedes-Benz GLS/GL

The Arnott AS-3156 is a new front left air suspension strut for select 2013-2018 Mercedes-Benz GL-Class and 2017-2019 Mercedes-Benz GLS-Class models with AIRMATIC and without ADS. It combines OE-style ride control with a passive Eibach monotube damper for consistent comfort and handling.

Built with Tier 1 components and assembled in the USA, this Arnott air suspension strut is engineered for drivers replacing a worn front left unit on a Mercedes-Benz GL350, GL450, GL550, GL63 AMG, GLS450, GLS500, GLS550, GLS63 AMG, or GLS350d.

Key Features

• Front left air suspension strut for AIRMATIC-equipped vehicles without ADS
• Passive Eibach monotube damper tuned for OE-like ride quality
• Cross-axis, multi-ply Continental ContiTech air sleeve
• Steel top mount and clevis for a direct-fit replacement layout
• Hydraulic internal damper with progressive spring rate
• Protective can, dust boot, polyurethane bump stop, O-rings, airline fitting, and check valve
• New assembly with mounting hardware included
• Designed and assembled in the USA

Detailed Description

Arnott AS-3156 is a premium aftermarket air suspension strut engineered for the front left side of the Mercedes-Benz GL/GLS-Class. It is built for vehicles with AIRMATIC and without Adaptive Suspension (ADS or ADS+), making it a direct replacement choice for the specified GL and GLS applications. The assembly uses a passive Eibach monotube damper and a progressive spring rate to help maintain controlled ride response while preserving comfort over uneven pavement.

The construction includes a Continental ContiTech air sleeve, steel mounting points, a protective dust boot, and supporting components such as a check valve and airline fitting. This part cross-references Mercedes-Benz OE numbers 1663202513 and 1663204966 for the same application. AS-3156 is a practical replacement when servicing a Mercedes-Benz GL350, GL450, GL550, GL63 AMG, GLS450, GLS500, GLS550, GLS63 AMG, or GLS350d front left suspension corner.

What It Helps Fix

• Front-end sag from a leaking or worn air spring
• Uneven ride height on the left front corner
• Excessive bouncing or reduced damping control
• Air suspension noise caused by aging internal components
• Ride quality loss from a failing OE-style strut assembly

Installation Notes and Tips

Fits 2013-2016 Mercedes-Benz GL350, front left; 2013-2016 Mercedes-Benz GL450, front left; 2013-2016 Mercedes-Benz GL550, front left; 2013-2016 Mercedes-Benz GL63 AMG, front left; 2013-2015 Mercedes-Benz GL500, front left; 2017-2019 Mercedes-Benz GLS450, front left; 2019 Mercedes-Benz GLS500, front left; 2017 Mercedes-Benz GLS500, front left; 2017-2019 Mercedes-Benz GLS550, front left; 2017-2019 Mercedes-Benz GLS63 AMG, front left; 2017 Mercedes-Benz GLS350d, front left.

Verify the vehicle is equipped with AIRMATIC and does not use ADS or ADS+ before installation. Confirm the front left position and compare OE part numbers before ordering. Proper system depressurization and suspension calibration procedures should be followed during service.

Quality Assurance

Arnott engineers this replacement air suspension strut with Tier 1 components and assembles it in the USA. The AS-3156 is backed by Arnott's industry-leading warranty.