Genuine OEM 2213203572 - Suspension Self-Leveling Unit Line

Product Overview

This Genuine OEM 2213203572 suspension self-leveling unit line is an original Mercedes-Benz component designed for the W221 S-Class sedan (2007–2011). The self-leveling suspension system maintains consistent ride height and handling characteristics across varying load conditions, a hallmark of Mercedes engineering. This line carries pressurized fluid between the self-leveling unit and the suspension struts, and any cracks, leaks, or degradation will compromise the system's ability to maintain proper vehicle height and comfort. Choosing a Genuine OEM part ensures factory-specification compatibility and the durability expected from Mercedes-Benz.

Symptoms of a Failing Suspension Self-Leveling Unit Line

• Vehicle sits noticeably lower on one or both sides, even when parked on level ground.
• Suspension does not automatically adjust height after loading cargo or passengers.
• Visible fluid leaks or wet spots beneath the suspension area.
• Hissing or squealing sounds from the suspension system when the engine starts.
• Uneven or sagging appearance of the vehicle body relative to the wheels.
• Warning messages or suspension fault codes displayed on the instrument cluster.

Cross Reference Numbers

This Genuine OEM 2213203572 is equivalent to or replaces the following part numbers: 2213202672, 221320357200, 221320267200.

Vehicle Compatibility

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

• Mercedes-Benz S550 5.5 V8 Gas (W221): 2007–2011, RWD and 4MATIC
• Mercedes-Benz CL550 5.5 V8 Gas (W221): 2007–2010, RWD and 4MATIC

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

Often Replaced Together

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

• Self-leveling suspension struts (front and rear axle pairs)
• Suspension fluid or hydraulic oil specific to the self-leveling system
• Suspension control module or level control relay if electrical faults are present
• Additional self-leveling lines or hoses showing similar age or wear

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Frequently Asked Questions

How do I know if my Mercedes-Benz W221 S550 or CL550 suspension self-leveling system needs service?

The most obvious sign is a sagging ride height that does not correct itself after the engine starts. If your vehicle sits lower on one corner or both rear corners, or if the suspension takes longer than usual to level out when you load cargo, the self-leveling unit line or related components may be leaking or failing. You may also notice fluid stains under the car or hear hissing from the suspension area during engine startup.

Can I replace just the self-leveling unit line, or do I need to replace the entire suspension system?

The self-leveling unit line is a standalone component and can be replaced independently. However, if the line has failed due to age or pressure cycling, the struts and other suspension components may have been exposed to pressure loss for some time. Many technicians recommend inspecting the struts, seals, and control module when servicing the line to prevent repeat failures and ensure the system operates at full efficiency.

What is the difference between the OE part numbers listed for this line?

Mercedes-Benz uses multiple part number formats for the same component. The numbers 2213203572, 221-320-35-72, and 2213202672 all refer to genuine self-leveling lines for the W221 S-Class and CL-Class. Verify fitment using your vehicle's VIN or consult the parts diagram to confirm which specific variant your vehicle requires, as there may be minor differences in hose routing or connector type between model years.

Is this a left-side, right-side, or universal line?

The self-leveling suspension system typically uses separate lines for the front and rear axles. Consult your vehicle's service manual or parts diagram to identify the exact position and routing of this particular line. Some vehicles may use a single shared line, while others have dedicated left and right lines; the part number and fitment data will clarify which application this line serves.

What tools and skills are required to replace this suspension line?

Replacing a self-leveling suspension line requires basic hand tools, a floor jack, jack stands, and potentially a suspension fluid extraction kit. The suspension system may be pressurized, so depressurizing or venting the system before disconnecting lines is essential to avoid fluid spray and ensure safety. This is a moderate-difficulty job suitable for experienced DIY technicians with suspension experience, though many prefer to have a professional Mercedes specialist handle it to avoid air introduction into the hydraulic circuit.

Will the suspension system need to be bled or purged after I install the new line?

Yes, after installing a new self-leveling unit line, the suspension system should be bled to remove any air that entered during the replacement. Air in the hydraulic circuit will prevent the system from leveling correctly and may cause noise or erratic behavior. Consult the factory service manual for the correct bleeding procedure and fluid specifications for your specific model year, as the process varies between W221 generations.

Order Genuine OEM 2213203572 today. 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.