FCS Q4009 Air Suspension Spring - Rear Left

FCS Q4009 Rear Left Air Suspension Spring

The FCS Q4009 is a rear left air suspension spring for Mercedes-Benz models equipped with AIRMATIC. It is listed for a wide range of E-Class and CLS applications from 2010-2018, including Mercedes-Benz E350, E63 AMG, and CLS550 rear left fitments.

Key Features

• Air suspension spring for the rear left position
• Fits Mercedes-Benz vehicles with AIRMATIC
• Application coverage includes E-Class and CLS models
• Part number: Q4009
• Brand line: FCS

Fitment Details

• Fits 2015-2018 Mercedes-Benz CLS400, rear left, with AIRMATIC; FCS
• Fits 2012-2018 Mercedes-Benz CLS550, rear left, with AIRMATIC; FCS
• Fits 2014-2018 Mercedes-Benz CLS63 AMG S, rear left, with AIRMATIC; FCS
• Fits 2012-2016 Mercedes-Benz E200, rear left, with AIRMATIC; FCS
• Fits 2010-2016 Mercedes-Benz E300, rear left, with AIRMATIC; FCS
• Fits 2015-2016 Mercedes-Benz E350, rear left, with AIRMATIC; FCS
• Fits 2010-2016 Mercedes-Benz E500, rear left, with AIRMATIC; FCS
• Fits 2010-2016 Mercedes-Benz E63 AMG, rear left, with AIRMATIC; FCS
• Fits 2014-2016 Mercedes-Benz E63 AMG S, rear left, with AIRMATIC; FCS
• Fits 2012-2014 Mercedes-Benz CLS350, rear left, with AIRMATIC; FCS
• Fits 2012-2014 Mercedes-Benz CLS63 AMG, rear left, with AIRMATIC; FCS
• Fits 2010-2014 Mercedes-Benz E350, rear left, with AIRMATIC; 212 Body Code; FCS
• Fits 2011-2013 Mercedes-Benz E250, rear left, with AIRMATIC; FCS

What It Helps Address

• Rear suspension sag on AIRMATIC-equipped Mercedes-Benz models
• Uneven ride height at the rear left corner
• Loss of air spring support in the suspension system
• Ride quality issues caused by a worn rear air spring

Installation Notes

Confirm the vehicle is equipped with AIRMATIC and verify the rear left position before ordering. Match the part number Q4009 to the vehicle application and inspect related suspension components during replacement. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

FCS Q4009 is cataloged for direct application coverage on specific Mercedes-Benz CLS and E-Class models with AIRMATIC. Use the fitment list to confirm year, model, and position before installation.