Genuine OEM 0031846101 - Suspension Self-Leveling Unit Filter

Product Overview

The Genuine OEM 0031846101 suspension self-leveling unit filter maintains proper operation of the air suspension system found on Mercedes-Benz luxury sedans, coupes, and roadsters from 2000 to 2012. This filter is essential for the self-leveling suspension that automatically adjusts vehicle ride height and damping characteristics across W220 (S-Class sedan), C215 (CL-Class coupe), and R230 (SL-Class roadster) platforms. The filter removes contaminants from the hydraulic fluid that powers the suspension actuators, preserving system performance and component longevity. Genuine OEM parts ensure factory-specification fit and compatibility with your Mercedes-Benz air suspension electronics and sensors.

Symptoms of a Failing Suspension Self-Leveling Unit Filter

• Vehicle sits lower than normal or fails to level properly when parked
• Suspension warning lights or error messages on the instrument cluster
• Uneven ride height between front and rear, or side-to-side imbalance
• Sluggish or delayed response when the suspension adjusts during acceleration or braking
• Hissing or unusual noises from the suspension pump or actuators
• Reduced ride comfort or increased harshness over bumps

Cross Reference Numbers

This Genuine OEM 0031846101 filter is equivalent to or replaces the following part numbers: 003-184-61-01, 0031845101.

Vehicle Compatibility

This filter fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• Mercedes-Benz S430 4.3 V8 Gas (W220): 2003–2006
• Mercedes-Benz S430 Base 4.3 V8 Gas (W220): 2000–2006
• Mercedes-Benz S500 4.3 V8 Gas (W220): 2000–2006
• Mercedes-Benz S500 4MATIC 5.0 V8 Gas (W220): 2003–2005
• Mercedes-Benz S500 Base 5.0 V8 Gas (W220): 2000–2006
• Mercedes-Benz S550 5.5 V8 Gas (W220): 2006
• Mercedes-Benz S55 AMG 5.5 V8 Gas (W220): 2001–2006
• Mercedes-Benz S600 5.8 V12 Gas (W220): 2001–2006
• Mercedes-Benz S600 Base 5.5 V12 Gas (W220): 2003–2006
• Mercedes-Benz S65 AMG 6.0 V12 Gas (W220): 2006
• Mercedes-Benz CL500 5.0 V8 Gas (C215): 2000–2006
• Mercedes-Benz CL55 AMG 5.5 V8 Gas (C215): 2001–2006
• Mercedes-Benz CL600 5.8 V12 Gas (C215): 2001–2006
• Mercedes-Benz CL600 Base 5.5 V12 Gas (C215): 2003–2006
• Mercedes-Benz CL65 AMG 6.0 V12 Gas (C215): 2005–2006
• Mercedes-Benz SL500 5.0 V8 Gas (R230): 2003–2006
• Mercedes-Benz SL550 5.5 V8 Gas (R230): 2007–2009, 2011–2012
• Mercedes-Benz SL55 AMG 5.5 V8 Gas (R230): 2003–2008
• Mercedes-Benz SL600 5.5 V12 Gas (R230): 2003–2009
• Mercedes-Benz SL63 AMG 6.3 V8 Gas (R230): 2009, 2011–2012
• Mercedes-Benz SL65 AMG 6.0 V12 Gas (R230): 2005–2009, 2011
• Mercedes-Benz SL65 AMG Black Series 6.0 V12 Gas (R230): 2009

This filter may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete suspension system service, many owners replace the following at the same time:

• Air suspension struts and dampers
• Suspension control arm bushings and ball joints
• Air suspension compressor and pump seals
• Hydraulic hose assemblies and fittings

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Frequently Asked Questions

How do I know if my Mercedes-Benz W220 S-Class or R230 SL-Class suspension self-leveling filter needs replacement?

A clogged or failing filter will cause the air suspension system to lose its ability to maintain proper ride height. You may notice the vehicle sitting lower than normal, uneven ride height between corners, or suspension warning lights on the dashboard. The suspension pump may also work harder and louder as it tries to push fluid through a restricted filter. If your Mercedes-Benz is displaying air suspension error codes or the ride height cannot be adjusted via the suspension control buttons, filter replacement is a common first step in diagnosis.

How often should I replace the suspension self-leveling unit filter?

Suspension filters are typically replaced during major air suspension service intervals or when symptoms of restriction appear. The frequency depends on driving conditions and the cleanliness of the hydraulic fluid. Many owners find it beneficial to replace the filter when servicing other suspension components, such as air struts or the suspension compressor. Consult your vehicle's service manual or a Mercedes-Benz specialist for specific replacement intervals based on your model year and driving patterns.

Is this filter a Genuine Mercedes-Benz part?

Yes. This 0031846101 filter is a Genuine OEM Mercedes-Benz part, manufactured to factory specifications and used by Mercedes-Benz dealerships. Genuine parts ensure exact fit, proper sealing, and full compatibility with your vehicle's air suspension control module and hydraulic system. Using Genuine OEM components preserves your suspension's performance and reliability, and many dealership warranty programs require Genuine parts for coverage.

What is the difference between the 0031846101 and 0031845101 filter numbers?

Both part numbers are equivalent filters that fit the same vehicles and serve the same function. The 0031845101 may represent an earlier or alternative production version, but they are interchangeable. Always verify fitment using the vehicle selector tool to confirm which part number is correct for your specific model year and suspension configuration.

Can I replace the suspension filter myself, or do I need professional help?

Suspension self-leveling unit filter replacement requires access to the air suspension system and may involve depressurizing hydraulic lines. While experienced DIY technicians can perform this work, most owners benefit from professional installation to avoid fluid loss, air introduction into the system, or accidental damage to suspension sensors and actuators. A Mercedes-Benz specialist or qualified independent shop can complete the replacement quickly and verify that the suspension system is functioning correctly afterward.

Will replacing the filter fix suspension warning lights on my Mercedes-Benz?

A clogged filter can trigger suspension warning lights if it restricts fluid flow enough to cause system pressure drops or sensor faults. Replacing the filter may resolve the warning if the filter was the root cause. However, suspension warning lights can also indicate other issues, such as faulty height sensors, leaking struts, or a failing compressor. If warning lights persist after filter replacement, a full suspension system diagnostic is recommended to identify the underlying problem.

Order Genuine OEM 0031846101 today to restore proper operation of your Mercedes-Benz air suspension system. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your Mercedes-Benz.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.