A251 320 0425 Rear Air Suspension Spring Bag for Mercedes-Benz W251 R-Class
1. Product Introduction
Original OE Number: A251 320 0425
Product Name: Mercedes-Benz W251 R-Class Rear Air Spring, Rear Air Suspension Bag Assembly
Installation Position: Rear air suspension system, universal for rear left and rear right, not compatible with front positions. Exclusively suitable for Mercedes-Benz W251/V251 chassis R-Class models with original Airmatic air suspension. Not applicable for mechanical suspension, front air suspension and other chassis models.
Product Description: A251 320 0425 is an original factory matching rear air spring bag assembly for Mercedes-Benz W251 R-Class commercial SUVs, and it is a high-frequency vulnerable core part of the air suspension system. As a large commercial vehicle, the Mercedes R-Class has a heavy curb weight, and the rear suspension bears high load for a long time due to frequent passenger and cargo carrying. The original rear air bag is prone to common faults such as rubber aging, bladder cracking, layered bulging, chronic micro air leakage, rear body sinking after parking, unbalanced left and right body height, chassis abnormal noise on bumpy roads, air suspension warning light alarm and frequent air pump start-stop. Strictly replicated according to the original factory air bag size, stroke and pressure resistance parameters, this product adopts thickened explosion-proof composite rubber specially designed for European commercial vehicles, multi-layer high-density tensile cords, integrated sealing base and dust-proof anti-wrinkle structure. As an integrated one-piece air bag assembly, no old parts splicing or secondary processing is required. It can directly replace the damaged, leaking and collapsed original rear air bag without vehicle damage, accurately restoring the original factory rear suspension support height, chassis shock absorption comfort and automatic leveling function, and completely solving the rear air suspension air leakage and rear sinking faults of W251 models.
Core Advantages
- 1:1 precise replication of original A2513200425 air bag parameters, with bladder stroke, pressure resistance value, sealing caliber and mounting hole positions fully matched with original vehicles. Universal for rear left and right, supports non-destructive direct installation with no fault codes and no modification of original brackets and pipelines
- Perfectly compatible with Mercedes-Benz W251 original Airmatic intelligent air suspension electronic control system, ensuring accurate body height calibration and stable automatic leveling after installation, fully restoring the original factory chassis driving texture and comfort
- Specially strengthened for W251 rear suspension’s long-term load-bearing, seasonal temperature aging and high-frequency bump working conditions, resisting strong sunlight, extreme cold and high-pressure fatigue deformation, completely avoiding short-term cracking, bulging and repeated air leakage of ordinary aftermarket air bags
- Integrated high-pressure sealing molding technology with air tightness far exceeding industry standards, maintaining long-term air tightness and thoroughly solving common faults such as rear body sinking after overnight parking, single-side rear wheel sinking, rear suspension bump abnormal noise, occasional air suspension alarm and frequent air pump operation
- Integrated air bag assembly replacement solution directly solves structural air leakage caused by bladder damage. Compared with repair kit maintenance, it has longer service life, higher stability and ultra-low rework rate, ideal for long-term repair and replacement
- Every product undergoes strict factory tests including high-pressure air tightness test, heavy-load pressure resistance test and high & low temperature aging test, delivering stable and consistent quality for 4S routine maintenance, professional repair shop precision overhaul and cross-border bulk stocking
2. Custom Attributes (E-commerce Listing)
Brand: Mercedes-Benz
Chassis Code: W251 / V251 (R-Class Exclusive Chassis)
Compatible Vehicle: Mercedes-Benz R-Class
Applicable Years: 2006–2013 All original factory air suspension versions
Installation Position: Rear air suspension, universal for rear left and rear right, not compatible with front positions
Product OE: A251 320 0425
Product Type: Air Spring Assembly / Rear Air Suspension Bag Assembly
Full Assembly: Complete integrated air bag assembly for direct vehicle replacement
Compatible System: Mercedes-Benz Original Airmatic Adaptive Air Suspension System
Material: European commercial vehicle-specific high and low temperature resistant explosion-proof composite rubber, multi-layer high-density tensile woven cords, precision high-pressure sealing components, anti-corrosion and wear-resistant base, integrated dust-proof and tear-resistant structure
Process Standard: Original air bag size replication, high-pressure air tightness detection, weathering aging treatment, heavy-load pressure resistance reinforcement, non-destructive direct installation
Compatibility Note: Only suitable for W251/V251 chassis R-Class rear air suspension models; not applicable for mechanical suspension versions, front air suspension positions and other chassis models; rear left and right air bags are fully universal with no distinction required
3. Compatible Vehicles
Important Notice: This product is a dedicated rear air spring bag assembly for Mercedes-Benz W251/V251 R-Class chassis, universal for rear left and rear right, not universal for front and rear positions. Only applicable to models equipped with original Airmatic air suspension system. Mechanical suspension vehicles, front air suspension positions and other chassis models are not compatible.
- Mercedes-Benz R-Class W251/V251 Air Suspension Versions (R280, R300, R320, R350, R500)
Applicable Years: 2006–2013
4. Interchangeable OE Numbers
Main OE Number: A251 320 0425
Interchangeable Alternative OE: A2513200025, A2513200325
Interchange Remark: All the above numbers are original iterative universal models for W251 R-Class rear air suspension bags, with 100% interchangeable structure, bladder size, pressure resistance parameters and mounting positions. They can be directly replaced with each other without compatibility faults or error codes after installation.
5. FAQ
Q1: Is A2513200425 rear air bag universal for rear left and rear right?
A: Fully universal. The W251 R-Class rear air spring bag has no left or right distinction, which can be directly interchanged and installed on rear left and rear right positions without position distinction.
Q2: Can this rear air bag be installed on front positions or other chassis models?
A: No. The structure, bladder stroke and pressure resistance parameters of front and rear air suspension bags are vastly different, and installation on front axles is strictly prohibited. It only fits W251/V251 R-Class, not applicable for W164, W166 and other chassis models.
Q3: Is it suitable for mechanically suspended R-Class models?
A: No. Mechanical suspension models are not equipped with air suspension pumps, pipelines, control modules and mounting bases, with no installation conditions for air bags.
Q4: Is computer programming required after replacing the new rear air bag?
A: No programming and coding required. Adopting 1:1 original air bag parameter adaptation, only air tightness test, body height calibration and fault code clearing are needed after installation for normal use.
Q5: What symptoms require replacement of this rear air bag?
A: Replacement is recommended if the vehicle has rear body sinking after overnight parking, single-side rear wheel collapse, unbalanced left and right body height, chassis abnormal noise on bumpy rear roads, air suspension warning light on, frequent air pump operation, cracked or bulged air bag bladder, chronic air leakage, or repeated air leakage after repair kit maintenance.
Q6: What is the difference between 0425, 0025 and 0325?
A: All are original iterative universal models for W251 R-Class rear air suspension bags with completely consistent size, structure, performance and installation methods. They only differ in factory batch iteration numbers and can be interchanged freely.
6. Custom Service
- OEM & Private Label Customization: Support custom brand logo silk printing, neutral no-label export packaging and foreign trade color box customization, suitable for cross-border platforms such as Amazon, eBay, AliExpress.
- Bulk Supply Service: Support large-volume spot goods and full-container foreign trade orders for A2513200425 Mercedes-Benz W251 R-Class rear air suspension bags with long-term stable supply.
- Complete Air Suspension Parts Matching: Supply full range of W251 air suspension accessories, including front air bags, air suspension repair kits, air compressors, distribution valves, dryer bottles and height sensors for one-stop procurement.
- E-commerce Material Support: Provide real product photos, detailed close-up images, specification tables and air suspension installation & maintenance reference materials for direct store listing.
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