FCS KY004 Air Suspension Compressor

Mercedes-Benz Air Suspension Compressor

The FCS KY004 air suspension compressor is a direct-fit replacement for select Mercedes-Benz models equipped with AIRMATIC, and on many applications, ADS. It is built for vehicles that rely on a functioning compressor to maintain ride height and suspension performance. Compatible with Mercedes-Benz GLE, GLS, GL, and ML applications across multiple model years.

Key Features

• Air suspension compressor for Mercedes-Benz AIRMATIC-equipped vehicles
• Fits select models with ADS where noted in the fitment data
• Application coverage includes GLE, GLS, GL, and ML platforms
• FCS KY004 replacement part number for catalog matching
• Designed for direct replacement on listed vehicle configurations

Detailed Fitment and Application

This compressor is listed for 2012-2020 Mercedes-Benz applications, including GLE350, GLE400, GLE500, GLE63 AMG, GLS450, GLS550, GL450, GL550, ML350, and related variants. Use the exact fitment notes to confirm whether your vehicle requires AIRMATIC only or AIRMATIC with ADS. The FCS KY004 is a practical replacement choice when servicing Mercedes-Benz air suspension systems that need restored compressor output and stable suspension operation.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Suspension sitting low after the vehicle is parked
• Compressor running frequently or failing to build pressure
• Air suspension warning messages related to compressor performance
• Uneven ride height on AIRMATIC-equipped Mercedes-Benz models
• Loss of normal suspension adjustment on listed GLE, GLS, GL, and ML vehicles

Installation Notes and Tips

Verify the vehicle’s suspension system before ordering, especially whether it uses AIRMATIC and ADS as noted in the fitment table. Confirm the model year, trim, and suspension configuration against the vehicle identification data and existing compressor part number. After installation, inspect the air lines, relay, fuse, and suspension leaks so the new compressor is not overworked.

Quality Assurance

FCS KY004 is cataloged as an air suspension compressor for the listed Mercedes-Benz applications and should be matched carefully to the exact suspension setup shown in the fitment data.