Mercedes S Class W221 S350 S400 S550

1. Product Overview

This front air suspension shock absorber assembly is designed for compatible Mercedes-Benz S-Class W221 vehicles equipped with factory air suspension.

Combining an air spring and shock absorber in one assembly, the product helps support the vehicle's front suspension system. The air spring helps maintain ride height, while the shock absorber controls suspension movement and reduces vibrations caused by uneven road surfaces.

It is intended as a replacement for compatible original components that have become worn, damaged, or developed air leaks or reduced damping performance.

Key Features

• Designed for compatible Mercedes-Benz S-Class W221 applications

• Integrated air spring and shock absorber assembly

• Helps maintain vehicle ride height

• Supports driving comfort and suspension stability

• Multiple OE reference numbers for fitment identification

• Suitable for replacement after part-number and vehicle verification

Installation Notes

Professional installation is recommended. Confirm the original OE number, front-left or front-right installation position, vehicle production date, and suspension configuration before purchase. After installation, inspect for air leakage and verify that the suspension system operates correctly.

2. Product Specifications

3. Key Features & Advantages

3.1 Reliable Air Tightness

The product features a high-density natural rubber inner layer with good gas barrier properties, ensuring minimal leakage under continuous high-pressure operation and maintaining consistent ride height and load support. The inner layer has uniform thickness with no pinholes or bubbles, and every unit passes full air tightness testing before shipment.

3.2 High Burst Strength

The bellows delivering burst pressure exceeding 3.0 MPa

3.3 Extended Fatigue Life

Optimized cord winding angle and rubber compound formulation ensure good flex fatigue resistance, withstanding over 2,000,00.

3.4 Good Weather Resistance

The outer rubber layer with good resistance to ozone, UV radiation, oils, and extreme temperatures, ensuring stable performance in various environments.

3.5 Full Quality Tested

Every finished product undergoes full air tightness testing, dimensional inspection, and visual quality checks before shipment. Regular batch sampling tests are conducted for burst pressure, fatigue life, and stiffness characteristics to ensure consistent product performance. Complete production records are maintained for full traceability.

3.6 OE Standard Direct Fit

Manufactured to  standard dimensions with installation dimensions matching equipment components, enabling direct replacement without modification required. Ensuring convenient and efficient installation.

4. Quality Control System

We have established a complete quality management system implementing full-process quality control from raw material incoming inspection to finished product shipment:

6. Applications

• Make: Mercedes-Benz

• Model: S-Class W221

• Model Years: 2007–2012

• Installation Position: Front Left / Front Right, depending on the specific OE number

• OE Reference Numbers:

• 2213204913

• 2213200038

• 2213205113

• 2213209313

• 2213209713

• 2213207313

• 2213207413

• Suspension Type: Air Suspension

Fitment Notice: Compatibility depends on the exact OE number, vehicle version, and installation side. Please verify the original part number before ordering.

7. Packaging & Shipping

7.1 Packaging

● Each unit is individually wrapped in a protective plastic bag for dust and moisture protection.

● Packed in corrugated cartons (neutral packaging, NO LOGO, or customized as requested).

● Product label includes part number, specification, quantity, and batch number for traceability.

● Cartons are reinforced with edge protectors for safe long-distance transportation.

● Custom packaging design available for OEM/ODM orders.

7.2 Shipping

● By Sea — Cost-effective for large volume orders, suitable for regular shipments.

● By Air — Fast delivery for urgent orders, typically 5–10 working days worldwide.

● By Express (DHL, TNT, FedEx, UPS) — Door-to-door delivery for samples and small orders.

● Adequate stock maintained in warehouse for prompt shipment upon payment confirmation.

● Flexible shipping terms: EXW, FOB, CIF, DDP — as per customer preference.

8. Frequently Asked Questions

Q1: How do you guarantee your after-sales service?

A: We ensure after-sales service quality through the following measures:

● Strict inspection during production to ensure product quality.

● Rechecking products and packaging before shipment to ensure good condition.

● Continuously tracking and receiving customer feedback for ongoing improvement.

● Providing a 12-month warranty covering manufacturing defects, with free repair or replacement.

Q2: What will you do for customer complaints?

A: We respond quickly to every customer complaint within 24 hours. Our quality team will immediately investigate the issue, analyze root causes, and provide a comprehensive solution including replacement, credit, or corrective action as appropriate. We value every customer relationship and are committed to resolving issues promptly and fairly.

Q3: What is your terms of payment?

A: T/T 30% as deposit, and 70% before delivery. We will show you photos of the products and packages before you pay the balance. For established customers, more flexible payment terms can be discussed based on order volume and cooperation history.

Q4: Do you test all your goods before delivery?

A: Yes, we have full testing before delivery. Every air spring undergoes air tightness testing, dimensional inspection, and visual quality checks. In addition, we perform regular batch sampling tests for burst pressure, fatigue life, and stiffness characteristics to ensure consistent product performance.

Q5: How do you make our business long-term and good relationship?

A: We keep good quality and competitive pricing to ensure our customers benefit. We respect every customer as our friend and sincerely do business and make friends with them, no matter where they come from. Our commitment to quality, reliability, and customer satisfaction has helped us build lasting partnerships with distributors and importers across Europe, Southeast Asia, the Middle East, America, and Australia.

9. About Us

Qingdao Nuoruite Auto Parts Co., Ltd. is a professional enterprise specializing in the research, development, production, and sales of rubber air springs. The company always adheres to the philosophy of "excellence, honesty, cooperation for win-win" and pursues the policy of "excellence, integrity, service, innovation."

Our main products include air springs, air suspension systems, air compressors, rubber sleeves, and other suspension components, widely compatible with vehicle models from Mercedes-Benz, BMW, Audi, Land Rover, Porsche, Volkswagen, and other renowned brands. After years of development, the company offers an extensive product selection including both special and standard specifications, with competitive pricing and fast delivery, supported by efficient sales and after-sales service. Our products are sold worldwide, especially favored by distributors and importers in Europe, Southeast Asia, the Middle East, America, and Australia.

The company possesses a complete R&D system and advanced production equipment, with a strict quality management system implementing full-process quality control from raw material procurement to finished product shipment. We warmly welcome friends from all walks of life to call, email, or visit us for business negotiations, and sincerely hope to create a good future together with you.

10. Contact Us

For more product information, product catalog requests, price quotations, or sample requests, please feel free to contact us. Our team will respond to your inquiry within 24 hours.