A2213205513 Rear Left Air Suspension Shock Strut for Mercedes-Benz W221 S320 S350 S450  S500 S63AMG S65AMG (2006-2012)

A2213205513 Rear Left Air Suspension Shock Strut for Mercedes-Benz W221 S320 S350 S450 S500 S63AMG S65AMG (2006-2012)

1. Product Introduction

Original OE Number: A2213205513

Product Name: Mercedes-Benz W221 Rear Left Air Shock Absorber, S-Class Rear Axle Left Airmatic Air Suspension Strut Assembly, Rear Left Air Strut with ADS Electronic Adaptive Damping for 4MATIC

Installation Position: Rear axle left side (Side specific, only for rear left). Fits Mercedes-Benz W221 chassis S-Class & CL-Class vehicles equipped with factory Airmatic air suspension, ADS adaptive damping and 4MATIC all-wheel drive system. It is a core wearing spare part for rear load bearing, body posture balance, automatic ride height adjustment, vibration & noise filtering and 4MATIC chassis stability.

Product Description

OE A2213205513 is the factory-specified rear left air strut assembly with ADS exclusively for Mercedes W221 chassis 4MATIC models. Position-specific and only for rear left side, different from rear right and 2WD versions. The assembly integrates high-pressure burst-proof multi-layer composite air spring, precision hydraulic damper cylinder, OEM-spec ADS solenoid valve and multi-stage high-pressure sealing structure. Following Mercedes Airmatic and ADS intelligent chassis logic, it dynamically adjusts damping stiffness according to vehicle speed, load and road roughness. It perfectly meets the high rigidity support demand of 4MATIC chassis, balancing comfortable daily filtering, high-speed 4WD cruising stability, anti-roll performance during cornering and cushion protection on rough roads. It is an essential maintenance replacement part for W221 4MATIC flagship vehicles.

W221 4MATIC vehicles have higher curb weight and greater chassis load. The rear air struts bear continuous trunk load, rigid impact from 4WD chassis, aging caused by alternating high & low temperature, sediment and moisture corrosion on chassis, plus repeated inflation and deflation cycles, making them high-failure wearing parts for 4MATIC models. The rubber of original air spring tends to age, harden, crack, bulge and develop slow air leakage. Internal oil seal wear and hydraulic oil degradation cause weak damping. The ADS solenoid may suffer carbon accumulation, sticking, signal drift and delayed response. Typical failure symptoms: rear left sag, overnight rear end drop, obvious height difference on rear side, tilted body posture, frequent air compressor activation, slow or stuck height adjustment, failed height calibration, air suspension / ADS warning lamp on dashboard, bouncy rear end over bumps, unstable rear at high speed under 4WD mode, chassis shake during turning and degraded handling quality of 4MATIC chassis. Continuous driving with faulty struts will rapidly wear air compressor, valve block, air dryer and height sensor, trigger cascading failures of the whole air suspension system and greatly increase maintenance cost.

This A2213205513 rear left ADS air strut for 4MATIC is 1:1 reproduced strictly according to Mercedes OEM data. Stroke dimension, pressure rating for heavy 4WD load, damping coefficient, air spring burst pressure, ADS electronic parameters, 4MATIC-specific mounting holes and bushing interface size fully match OEM standards. It adopts thickened multi-layer imported anti-aging high-pressure rubber airspring, double anti-leak sealing structure, reinforced anti-rust precision piston rod, wide-temperature long-life anti-degradation hydraulic oil and high-sensitivity OEM-grade ADS solenoid valve. Upgraded anti-aging, anti-cracking, anti-corrosion, anti-fatigue and burst-resistant performance fundamentally solves OEM inherent defects of W221 4MATIC rear struts: air leakage, rear sag, weak damping, abnormal ADS signal, fault codes and unbalanced posture. This version is dedicated for W221 4MATIC, ADS equipped, rear left position. Direct bolt-on installation without chassis modification. Air tightness inspection, ride height calibration and ADS matching calibration are required after installation, fully compatible with original Airmatic air suspension, ADS adaptive damping and 4MATIC chassis control system. It completely repairs rear left sag, slow air leakage, abnormal height adjustment, loose chassis, unstable 4WD driving and warning faults. Restores the solid and premium chassis texture of Mercedes flagship 4MATIC models. It features high stability and low rework rate, suitable for repair shop service, bulk auto parts stocking and cross-border export business.

Core Advantages ✅ 1:1 OEM precise reproduction, dedicated for rear left 4MATIC with ADS. Mounting hole, stroke, pressure resistance and electronic parameters fully match original 4WD chassis ✅ Solves common faults of W221 4MATIC: rear left sag, tilted body, air suspension & ADS warning, compressor overload and loose unstable 4WD chassis ✅ Upgraded thickened multi-layer burst-proof airspring, wide temperature resistance and anti-aging, stable pressure holding to eliminate slow air leakage for heavy 4WD load ✅ Equipped with OEM-grade ADS solenoid valve, sensitive adaptive damping and stable signal, fully retains original intelligent chassis adjustment function ✅ Reinforced structure exclusively for 4MATIC, higher pressure tolerance than 2WD version, meets high rigidity and heavy load requirement of 4WD chassis ✅ Brand-new full assembly delivery, complete accessories without extra parts required. Bolt-on fit, restore original 4WD ride quality quickly after calibration

2. Custom Attributes for E-commerce Listing

3. Compatible Vehicles

Compatibility Instruction: OE A2213205513 is dedicated rear left air strut with ADS for W221 chassis 4MATIC, position-specific only for rear left. Only fits 2005‑2013 Mercedes‑Benz S-Class / CL-Class with factory Airmatic air suspension, ADS adaptive damping and 4MATIC all-wheel drive. Not compatible with 2WD, non-ADS, ABC active body control, mechanical spring suspension, other chassis or rear right position.

Exact Compatible Model List

1. Mercedes‑Benz S-Class W221 (2005‑2013): S350 4MATIC, S400 4MATIC, S550 4MATIC, S600 4MATIC, factory Airmatic 4MATIC ADS version
2. Mercedes‑Benz CL-Class W221 (2006‑2013): CL550 4MATIC, CL63 AMG 4MATIC, factory Airmatic 4MATIC ADS version

4. Interchangeable OE Numbers

Main OE Numbers: A2213205513

Interchangeable OE Numbers: A2213201338, A2213202113, A221320551380

Interchange Remark: The above OE numbers are iterative OEM interchange references for W221 rear left 4MATIC air struts with ADS. They share identical structure dimension, pressure rating for 4WD load, damping parameters, ADS solenoid specification, mounting holes and 4MATIC electronic compatibility. Direct non-destructive replacement without chassis modification.

5. FAQ

1. Q1: Which vehicles and position fit OE A2213205513? A: Fits Mercedes‑Benz W221 S-Class / CL-Class 2005‑2013 with factory Airmatic air suspension, 4MATIC all-wheel drive and ADS adaptive damping. Only for rear left side installation. Not applicable for 2WD, non-ADS, ABC, rear right side or other chassis.
2. Q2: Can this strut be installed on rear right or 2WD vehicles? A: Not available. This part is exclusive rear left version for 4MATIC. Mounting position, pressure resistance and electronic logic are designed for rear left 4WD chassis. It differs structurally from rear right and 2WD versions. Improper installation will cause abnormal ride height, fault codes and insufficient support.
3. Q3: Can it be fitted on 4MATIC vehicles without ADS? A: Not available. This strut has built-in ADS solenoid valve. 4MATIC cars without ADS lack corresponding wiring harness and control logic. It will continuously trigger fault codes after installation and adaptive damping function cannot work.
4. Q4: Does computer coding need after replacement? A: No coding required, but air-tightness inspection, ride height calibration and ADS solenoid matching calibration must be performed, clear fault codes before operation to restore full air suspension and ADS functions.
5. Q5: What symptoms indicate replacement of this rear left air strut? A: Rear left sag, unilateral overnight rear drop, obvious height difference on rear side, tilted body posture, frequent compressor operation, slow stuck height adjustment, air suspension & ADS warning lamp on, bouncy rear end over bumps, unstable rear and chassis shake during turning under 4WD mode. These symptoms indicate airspring leakage or ADS solenoid failure, replacement is recommended.
6. Q6: Is paired replacement required for rear struts if only rear left is damaged? A: Pair replacement of rear left and right is strongly recommended. 4MATIC chassis requires high consistency on rear damping, pressure retention and ADS response. Single-side replacement will cause asymmetric rear support, reduce high-speed 4WD stability and easily lead to pulling to one side.
7. Q7: Are interchange OE numbers mutually replaceable? A: Yes. All interchange OEs are universal iterative parts for W221 rear left 4MATIC ADS air struts. Dimension, structure, electronic and pressure parameters are fully consistent for direct bolt-on swap.

6. Custom Service

1. OEM Private Label Customization: Support logo silk printing, neutral no-label export package and customized color box, suitable for Amazon, eBay and other cross-border platforms.
2. Bulk Supply Service: A2213205513 in stock. Support retail, large-volume wholesale and full-container export with stable supply and fast lead time.
3. Complete Air-Suspension Parts Supply: One-stop supply for full W221 4MATIC air-suspension components: front & rear ADS air struts, 4MATIC dedicated air springs, air compressor, air dryer, valve block, height sensor, repair kits and more.
4. E-commerce Material Support: Provide real-product photos, close-up pictures, OE cross-reference table, 4MATIC compatible vehicle list and installation calibration reference documents for store listing and short-video marketing.