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Arnott SK-3978 Suspension Strut and Coil Spring Assembly - Front
| Brand | Arnott SK-3978 |
|---|---|
| Position | Front |
| 10527 | No |
| 10528 | No |
| 10530 | Passive |
| Compressed Length | 793.75 |
| Travel Length | 82.55 |
| Mounting Hardware Included | No |
| Internal Construction Type | Twin-tube |
| Grade Type | Standard |
| Housing Material | Steel |
| Extended Length | 876.3 |
| Adjustable | No |
| Lower Mount Type | Bracket |
| Upper Mount Type | Stud |
| Boot Included | No |
| Gas Charged | No |
| Adjustable Damping | No |
| Adjustable Rebound | No |
| Progressive Spring Rate | No |
| Coil Spring Included | Yes |
| Dust Shield Included | No |
| Bladder(s) Included | No |
| Bladder Heavy Duty Crimping Rings Included | No |
| Bladder Sleeve(s) Included | No |
| Air Adjustable | No |
| Air Bladder | No |
| Air Bladder Material | No |
| Air Ride Suspension | No |
| Bearing Plate Included | No |
| Body End Measuring Point | Center eye |
| Coil Over Springs Included | Yes |
| Product line | Coil Strut Assembly |
| Fits | Mercedes-Benz · 18 vehicles |
OE-matched performance. Internal settings are tuned to mimic original strut behavior.
Twin-tube construction. Hydraulic damping and steel housing support stable handling and comfort.
Coil spring included. Complete strut and spring assembly simplifies replacement.
Cross-references 1643200130 and 164320013064 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
OE-Style Front Coil Strut Assembly
Arnott SK-3978 is a front suspension strut and coil spring assembly built for Mercedes-Benz ML-Class applications that need a direct, passive OE-style ride response. It uses Arnott’s coil-over strut design to deliver stable handling, control, and comfort without external vehicle commands.
Compatible with 2006-2011 Mercedes-Benz ML500, 2007-2011 Mercedes-Benz ML350, 2008-2011 Mercedes-Benz ML550, and 2007-2009 Mercedes-Benz ML320, front. Arnott recommends replacing these struts in pairs for balanced suspension performance.
Key Features
- Part number: SK-3978
- Front suspension strut and coil spring assembly
- Passive design with no external commands from the vehicle
- Twin-tube construction with hydraulic internal damping
- Steel housing with black finish
- Coil spring included
- Upper mount type: stud
- Lower mount type: bracket
- New, standard-grade replacement part
- Not for diesel engines
Product Details
Arnott’s Coil Strut Assembly line focuses on restoring OE-like ride characteristics with a preassembled coil-over design. For SK-3978, Arnott engineers selected internal strut settings to match original performance targets for the Mercedes-Benz ML350, ML500, ML550, and ML320 front suspension applications. The result is a direct replacement built around passive operation, hydraulic damping, and a twin-tube strut body for consistent road control.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
Common Suspension Issues Addressed
- Front-end bounce or excessive body movement
- Uneven ride height caused by worn spring and strut components
- Noisy or loose-feeling front suspension response
- Reduced steering stability over bumps and rough pavement
- Loss of original ride comfort in ML-Class front suspension
Installation Notes
Verify vehicle fitment by year, model, and engine before installation. This assembly is for front position use only and is not for diesel engines. Mounting hardware is not listed as included, so confirm all required service parts before beginning the job. Arnott recommends replacing front struts in pairs to maintain even suspension response across the axle.
Quality Assurance
Arnott designs and tests this coil strut assembly to reproduce OE performance characteristics for the specified Mercedes-Benz ML-Class applications. SK-3978 is a new, standard replacement part engineered for direct suspension service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2011 | Mercedes-Benz | ML350 | Front | Coil Strut Assembly |
| 2011 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
| 2011 | Mercedes-Benz | ML550 | Front | Coil Strut Assembly |
| 2010 | Mercedes-Benz | ML350 | Front | Coil Strut Assembly |
| 2010 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
| 2010 | Mercedes-Benz | ML550 | Front | Coil Strut Assembly |
| 2009 | Mercedes-Benz | ML320 | Front | Coil Strut Assembly |
| 2009 | Mercedes-Benz | ML350 | Front | Coil Strut Assembly |
| 2009 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
| 2009 | Mercedes-Benz | ML550 | Front | Coil Strut Assembly |
| 2008 | Mercedes-Benz | ML320 | Front | Coil Strut Assembly |
| 2008 | Mercedes-Benz | ML350 | Front | Coil Strut Assembly |
| 2008 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
| 2008 | Mercedes-Benz | ML550 | Front | Coil Strut Assembly |
| 2007 | Mercedes-Benz | ML320 | Front | Coil Strut Assembly |
| 2007 | Mercedes-Benz | ML350 | Front | Coil Strut Assembly |
| 2007 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
| 2006 | Mercedes-Benz | ML500 | Front | Coil Strut Assembly |
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