More capacity, where approved
Uprating changes the approved maximum weight, not the vehicle’s actual weight. Weigh your vehicle in its normal travelling condition, including each axle, to understand your remaining payload.
Semi-Air Suspension Standard Kit for Mercedes Sprinter 4x4 (SRW) from 2018 onwards
Two separate air circuits let you adjust each rear air spring independently using individual inflation valves.
Regular price
£329.00
inc. VAT
The benefits at a glance
- Straightforward installation
Clear, step-by-step fitting instructions.
- Adjustable vehicle levelling
Adjust each side for uneven loads.
- Stability and handling
Added stability when carrying a load.
- Greater ride comfort
Helps cushion uneven roads.
- Extra support under load
Extra support for your original suspension.
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Inside the kit
What’s included in your kit
- 2 × air springs
4000KG - Rubena 170x3
- Set of metal mounting installation brackets
For the specified vehicle application.
- Set of nuts, bolts and washers
Hardware for assembling and securing the kit components.
- 2 × 8 m airline tubing
16 metres in total.
- 2 × 6 m protective conduit
12 metres in total.
- 2 × T-joints
3 in total when the compressor option is selected.
- Control unit
2 inflation valves and 2 pressure gauges for independent adjustment.
- 10 × airline zip ties
For securing the airline and conduit along their routing.
- Installation instructions
Step-by-step guidance for fitting your kit.
Optional upgrade
Compressor option includes
Included only when you choose a kit with a compressor.
- 1 × 12 V 120 PSI compressor
Onboard air supply for inflating the air springs.
- Wiring harness
Electrical connections for the compressor system.
- 1 × additional T-joint
3 T-joints in total.
- Compressor air filter
Helps keep dust and debris out of the compressor intake.
- 2 × non-return valves
Help prevent air flowing back through the compressor connections.
Vehicle weight uprating
This kit may help with up-plating
Conversions, extra equipment and everyday essentials all add weight. Vehicle uprating, also known as up-plating, may increase the permitted maximum loaded weight of an eligible vehicle, giving you more usable payload within its approved limits.
Suspension support. An assessed weight increase.
Fitting semi-air suspension does not automatically increase your vehicle’s legal weight limits. Confirm eligibility and any required upgrades with a suitably qualified uprating specialist before purchasing a kit for this purpose.
Where semi-air can help
Semi-air suspension adds support to the original rear suspension and helps reduce sag under load. An uprating assessment will determine whether suspension upgrades are required and whether the chosen kit is suitable.
Start with an assessment
Have your vehicle details, weight plate photograph, axle weights and tyre specifications ready. An assessor can confirm eligibility, any necessary changes and the documentation required before you proceed.
Independent uprating advice
Discuss your vehicle with SvTech
This guidance focuses on motorhomes and other leisure vehicles. SvTech assesses vehicles individually and can advise on eligibility, suitable suspension upgrades and the documentation needed.
For work vans, recovery trucks and other commercial vehicles, contact SvTech directly for advice specific to the vehicle and its use. Do not assume this kit will qualify your vehicle for an uprating.