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W221 W124 LHD Mercedes Benz Spring Shock Absorber Rear Left Right Replacement

China W221 W124 LHD Mercedes Benz Spring Shock Absorber Rear Left Right Replacement

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W221 W124 LHD Mercedes Benz Spring Shock Absorber Rear Left Right Replacement

MOQ： 1 pc
Price： Negotiable
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Payment Terms	D/A,D/P,T/T,Western Union
Supply Ability	5000 Sets/month
Delivery Time	3-15days
Packaging Details	Carton
Warranty	2 years
Position	Rear/L/R
Packing	Carton
Condition	New
Purpose	Replace/ Repair
Brand Name	FHD
Model Number	Mercedes Benz 221
Certification	ISO 9001
Place of Origin	China

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Product Details
Company Details

Product Specification


Payment Terms	D/A,D/P,T/T,Western Union	Supply Ability	5000 Sets/month
Delivery Time	3-15days	Packaging Details	Carton
Warranty	2 years	Position	Rear/L/R
Packing	Carton	Condition	New
Purpose	Replace/ Repair	Brand Name	FHD
Model Number	Mercedes Benz 221	Certification	ISO 9001
Place of Origin	China
High Light	w124 Spring Shock Absorber ，LHD Spring Shock Absorber ，LHD w124 rear shock replacement

221 Mercedes-Benz S Class Rear Left Right Air Shock Cartridge Core Unit

Product Overview

Sturdy load-bearing, OE-grade air shock absorber core (strut only) for Mercedes-Benz 221 rear left and rear right positions. This product includes the strut only, without air spring.

Specifications

Vehicle Application	Mercedes-Benz S-Class (W221 / V221)
Installation Position	Rear Left (Vehicle Left Side, Driver's Side Rear on LHD Vehicles) / Rear Right (Vehicle Right Side, Passenger Side Rear on LHD Vehicles)
Component Type	Shock Absorber Core / Strut Only (Without Air Spring, Must Be Used with Original or New Air Spring)

Product Description

This air shock absorber core (strut) is designed for the rear air suspension system of the Mercedes-Benz 221 chassis, available in two separate versions for rear left and rear right positions. This strut-only component is ideal for repair scenarios where the original rear air spring remains fully functional but the strut damping has degraded or failed.

Unlike front struts, the rear strut primarily handles load-bearing and stabilization tasks at the rear of the vehicle, focusing on suppressing rear-end squat during acceleration, filtering road impacts transmitted through the rear wheels, and maintaining vehicle level under load conditions. Through an internal hydraulic valve system, it regulates compression and rebound rates, working in coordination with the rear air spring, rear lower control arm, stabilizer bar and subframe to form the Mercedes-Benz AIRMATIC rear suspension system.

The Mercedes-Benz 221 chassis was produced between 2005 and 2013 as the fifth generation of the S-Class. This product is manufactured to original equipment structural dimensions, with lower mounting bush hole positions, top fixing threads, and bump stop height limits all consistent with original factory specifications, allowing direct replacement of the old strut without modifications.

Key Features

Independent Strut (No Air Spring): Designed for scenarios where the air spring is intact and only the strut has failed, reducing complete assembly replacement cost
Left/Right Specific: Rear left and rear right have different damping characteristics and are not interchangeable
Load Optimized: Valve tuning is calibrated for rear axle load demands, suppressing rear-end squat under heavy load or acceleration
Comfort Oriented: Damping settings lean toward softness, maintaining the premium rear-seat ride quality of the S-Class
Vibration Priority: Effectively filters small road imperfections transmitted through the rear wheels, enhancing rear-seat comfort
Factory Verified: Each unit undergoes damping force curve testing and high-pressure air tightness verification

Important Note: This product is suitable for Mercedes-Benz 221 chassis S-Class (2005-2013), including W221 (standard wheelbase) and V221 (long wheelbase) versions. The rear strut is available in two versions: with induction (compatible with adaptive damping) and without induction. Before purchasing, check whether the original strut tower has a solenoid valve wiring harness connector. Please verify the original OE part number or VIN code before purchasing.

Warehouse & Workshop

Keep dry, clean and handle with care.

Packing & Delivery

Professional, environmentally friendly, and efficient packaging services ensure the safety of your goods during transit.

Frequently Asked Questions

Q1: How can I tell whether the Mercedes-Benz 221 rear strut is already damaged?

Common signs of damage include: a dull "thumping" noise when the rear wheels go over speed bumps, noticeably increased bumpiness for rear seat passengers, increased rear-end squat during acceleration, and wavy uneven wear on the rear tires. A simple self-check method: after stopping the vehicle, press down firmly on one side of the rear bumper and release quickly. If the body bounces up and down more than twice before stopping, the damping on that side has significantly degraded.

Q2: Are the 221 rear left and rear right struts interchangeable?

No, they are not interchangeable. Although similar in appearance, the left and right rear struts on the 221 differ in internal damping valve calibration to accommodate the left-right load difference caused by fuel tank location, battery location, and rear passenger distribution. Forcibly swapping them will result in different rebound rhythms on both sides of the rear axle when going over bumps, affecting driving stability.

Q3: After replacing a single rear strut, is it necessary to also replace the other side?

Replacing in pairs is not mandatory; a single side can be replaced alone. However, note that the S-Class has high demands for ride comfort, and left-right suspension damping differences are easily perceived by rear seat passengers. If the other side strut has been in service for a long time (over 70,000 km or 5+ years), its damping force will differ from the new strut. It is recommended to decide whether to replace both sides based on the actual condition of the other side strut.

Q4: After replacing the strut, the instrument panel shows an "AIRMATIC Malfunction" warning, but the vehicle drives normally. What is the cause?

This situation is usually not a problem with the strut itself, but rather the air suspension system has not been reset after installation. After replacing rear suspension components on a Mercedes-Benz 221, a diagnostic tool (such as XENTRY or a compatible device) is required to perform "level calibration" and "component learning" on the AIRMATIC system.

Q5: Is the 221 rear strut suitable for both W221 and V221 wheelbase versions?

Yes, it is suitable. The rear suspension structure of the W221 (standard wheelbase) and V221 (long wheelbase) is completely identical. The strut mounting dimensions, piston rod diameter, and damping characteristics are all the same, making them interchangeable.

Q6: What accessories are recommended to replace at the same time as the rear strut?

It is recommended to replace the following accessories simultaneously: the rear strut dust boot (if aged and cracked), the upper bump stop (may harden or crumble after long-term compression), and the top nut securing the piston rod (the original is a self-locking nut, which loses locking force after removal). In addition, check the rear stabilizer bar link ball joint for looseness and the rear lower control arm bushing for aging or cracking.

Q7: After replacing the strut, the rear suspension feels stiffer or bumpier than before. Is this normal?

Yes, this is normal. Over long-term use, the damping oil inside the old strut gradually degrades and damping force decreases. After the new strut restores the original factory damping level, rear seat passengers may feel more fine vibrations. Typically, after driving 300-500 km, the strut will gradually break in to a stable condition.

Q8: There is a "creaking" or "squeaking" noise from the rear wheel area while driving after strut replacement. What is the cause?

This type of noise requires careful diagnosis. Common causes include: 1) The top nut of the strut is not tightened to the specified torque; 2) The dust boot is not installed properly and is rubbing against the strut body; 3) The rear stabilizer bar link ball joint is aged; 4) The rear lower control arm bushing is aged. It is recommended to first check the stabilizer link and control arm bushings.

Q9: Is this product suitable for 221 models equipped with induction (adaptive damping)?

Please verify the actual vehicle configuration. 221 chassis models with induction damping have a solenoid valve wiring harness connector on the rear strut. This product is available in two versions: standard damping and induction. Choose based on your vehicle's original configuration. The two versions cannot be mixed.

Q10: Is a wheel alignment (chassis angle calibration) necessary after replacing the 221 rear strut?

Rear axle alignment is recommended. The 221 chassis S-Class rear suspension is a multi-link design. Removing the strut involves disconnecting the lower control arm from the subframe, which may affect rear wheel toe and camber after installation. It is recommended to drive 30-50 km after replacement to allow the suspension to settle naturally before performing a rear wheel alignment.

Q11: Are the 221 rear strut and front strut interchangeable?

Absolutely not. The rear and front struts have fundamental differences in body length, piston rod diameter, mounting method, and damping valve tuning. Forcing interchangeability will result in chassis dynamic imbalance and seriously affect driving stability and comfort.

Q12: Is the 221 rear strut suitable for the later generation W222 S-Class?

No, it is not suitable. The W222 is the next-generation S-Class launched in 2013, with a completely different chassis structure, suspension geometry, and strut mounting dimensions. Parts are not interchangeable with the W221.

Company Details

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Business Type:

Manufacturer 
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Year Established:

2017 
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Total Annual:

5000000-10000000
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Employee Number:

50~100 
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Ecer Certification：

Verified Supplier 

Founded in 2017,Guangzhou Fenghui AutoParts Co.,Ltd.is an enterprise focusing on R&D, production,processing and export sales of variable damping inductive shock absorbers and air suspension for high-end cars. Main business:a full range of inductive shock absorbers, air suspension springs,pneuma... Founded in 2017,Guangzhou Fenghui AutoParts Co.,Ltd.is an enterprise focusing on R&D, production,processing and export sales of variable damping inductive shock absorbers and air suspension for high-end cars. Main business:a full range of inductive shock absorbers, air suspension springs,pneuma...

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Guangzhou Fenghui Automotive Parts Co., Ltd.
Room 401, Building 3, No. 33-1, Yongxing Road, Huadong Town, Huadu District, Guangzhou City, Guangdong Province
https://www.strutairsuspension.com/

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