FCS Q4002 Air Suspension Spring - Rear

Rear Air Suspension Spring for Mercedes-Benz AIRMATIC

Restore rear ride support with the FCS Q4002 air suspension spring for select Mercedes-Benz R-Class models equipped with AIRMATIC. This rear air spring is listed for 2006-2007 Mercedes-Benz R500, 2007 Mercedes-Benz R63 AMG, and 2007-2009 Mercedes-Benz R320, plus 2010-2012 Mercedes-Benz R350 applications.

Key Features

• Rear air suspension spring for AIRMATIC-equipped vehicles
• Direct fitment for select Mercedes-Benz R350, R320, R500, and R63 AMG models
• FCS Q4002 part number for application-specific lookup
• Supports rear suspension height and load-carrying function
• Built for use on the rear suspension position only

Detailed Description

The FCS Q4002 is a rear air suspension spring for Mercedes-Benz R-Class vehicles with AIRMATIC. It is listed for Fits 2010-2012 Mercedes-Benz R350, Rear; Fits 2007-2009 Mercedes-Benz R320, Rear; Fits 2006-2007 Mercedes-Benz R500, Rear; and Fits 2007 Mercedes-Benz R63 AMG, Rear. If you are searching for a Mercedes-Benz R350 rear air suspension spring, Mercedes-Benz R320 AIRMATIC rear spring, or FCS Q4002 replacement, this part matches those confirmed applications.

FCS uses the Q4002 identifier to simplify ordering and fitment verification for the correct rear suspension spring on these Mercedes-Benz models. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Part Helps Address

• Rear end sagging from a worn air spring
• Uneven ride height at the back of the vehicle
• Air suspension warning conditions related to rear support loss
• Reduced load-leveling performance
• Harsh or unstable rear suspension behavior

Installation Notes and Tips

Verify that the vehicle is equipped with AIRMATIC before ordering. Confirm rear-position fitment against the vehicle identification data and existing suspension layout. After installation, inspect the air suspension system for leaks, compressor operation, and proper ride height calibration.

Quality Assurance

FCS Q4002 is cataloged as an application-specific replacement part for the listed Mercedes-Benz R-Class vehicles. Use the confirmed fitment data to match the correct rear suspension application before installation.