Mercedes-Benz X-Class Rear Full-Air Suspension Kit
The Mercedes-Benz X-Class shares its underpinnings with the Nissan Navara NP300 — and shares the same problem. Load it up, hook on a trailer or run it at payload and the standard coil rear suspension compresses under the weight. Rear sag, compromised geometry and a deteriorating ride quality follow. For an X-Class being used as a genuine working vehicle, that's a daily frustration.
This rear full-air kit from On Air Suspension replaces the standard coil rear suspension entirely. Air pressure takes over from coil spring rate — the system maintains near-constant ride height, geometry and handling regardless of load condition. It's a complete rear air suspension upgrade engineered for the shared NP300/X-Class platform.
Fitting is available at our Ongar, Essex workshop — call 01277 552030 to arrange. Parts are available for nationwide next day delivery if you're fitting the kit yourself or using a local installer.
Also fits: Nissan Navara NP300
Kit options
Three variants are available:
- AKF1200Z — Manual inflate kit, excluding automatic controls. Purchase with the On Air Active auto levelling controls kit for automatic height management.
- AKF1201Z — Heavy duty manual inflate kit, excluding automatic controls. Purchase with the On Air Active auto levelling controls kit for automatic height management.
- AKF1301Z — Heavy duty, includes On Air Active single height sensor auto controls.
Heavy duty variants are recommended for vehicles regularly operating at or near maximum payload.
Key components
- SABO / On Air air springs with NP300 platform-specific top mounting assembly
- Chassis brackets and tank mounting engineered for the NP300/X-Class platform
- 2-gallon air tank (2 port)
- Exhaust heat shield
- Full fixings, nylon tubing, fittings and hardware
- On Air Active S1.1 single sensor system (AKF1301Z)
Every kit is engineered in-house at our Ongar, Essex workshop — designed from scratch, prototyped using 3D printing, and validated through physical installation and testing before it reaches a customer.
Compatibility: Mercedes-Benz X-Class | Nissan Navara NP300
Need advice on which variant suits your vehicle or use case? Call us on 01277 552030 or use the contact form.
Due to the nature of this kit there can be a 2-3 week lead time, estimates and tracking are provided.