Six-Wheel Limousine Engineering for the W463
Kubay Design developed this Mercedes W463 extended limousine kit for a complete six-wheel transformation. The package combines a closed rear body, a reinforced frame, portal axles, drivetrain parts and carbon exterior details. As a result, a specialist workshop can plan the structural and mechanical work around one coordinated package.
This project goes far beyond a cosmetic exterior update. First, the installer extends the rear structure and prepares the additional driven axle. Next, the workshop aligns the longer body, suspension and braking components. Therefore, professional measuring, fabrication and final testing remain essential throughout the build.
The design creates a full-length limousine profile while retaining the strong proportions of the original donor. However, the finished vehicle remains a custom Kubay Design project. It is not an original factory six-wheel model, and its final specification depends on the selected donor and approved options.
Extended Closed Body and Reinforced Rear Structure
The one-piece closed rear body forms the main visual feature of the conversion. It extends the passenger area instead of using an open pickup bed. Consequently, the finished vehicle can support a private lounge, executive transport layout or bespoke show-car interior.
A reinforced rear frame supports the longer body and additional axle position. The workshop must align both sections before final welding, sealing or paint. In addition, technicians should confirm door openings, window positions, roof lines and wheel clearances during trial assembly.
Body Components Included
- One-piece extended limousine-style rear body
- Reinforced rear frame for the longer structure
- Integrated rear panoramic windows
- Optional interior floor panel
- Genuine carbon-fibre fender flares
- Long carbon-fibre side mouldings
- Lightweight carbon-fibre roof spoiler
- Reinforced steel front and rear skid plates
- Six rims with six tyres
The extended limousine body requires careful alignment with the donor cabin. For example, the roof transition, side openings and lower body line must remain consistent from front to rear. The workshop should complete all trial fitting before final surface preparation.
The current product page does not publish the exact body length, window dimensions, wheelbase increase or finished vehicle height. Therefore, Kubay Design must confirm these values within the individual project specification.
Carbon Details and Exterior Finishing
The package includes genuine carbon-fibre fender flares, long side mouldings and a roof spoiler. Together, these parts give the longer body a more precise and premium finish. They also connect the front section with the wider rear structure.
Carbon parts should be checked before installation. The workshop should review weave direction, surface quality and mounting points. Afterwards, technicians can decide whether the parts will keep a visible carbon finish or receive a colour-matched treatment.
The front and rear skid plates use reinforced steel. These parts add a stronger lower-body appearance and provide protection for selected exterior areas. However, the page does not state certified impact ratings or underbody protection standards.
Portal Axles and Six-Wheel Drivetrain Components
The portal axle limousine conversion includes the key suspension and drivetrain parts listed on the product page. Portal hubs can increase clearance beneath the axle line. At the same time, they change gearing, track width, unsprung mass and braking behaviour.
Suspension and Drivetrain Package
- Shock absorbers with reinforced springs
- Heavy-duty suspension spacers
- Portal axles for increased under-axle clearance
- Middle drive axle with differential
- Universal joints and silentblocks
- Brake-system fittings and hydraulic connections
The middle drive axle creates the additional driven wheel pair. Meanwhile, the universal joints and related components connect the extended drivetrain. The installer must check shaft angles, clearances and movement before the vehicle enters service.
The product page does not state the portal ratio, final ground-clearance increase, differential ratio or maximum axle load. Likewise, it does not publish a certified braking distance or payload figure. For this reason, the completed vehicle requires project-specific calculations and testing.
Wheel Package and Suspension Setup
The kit includes six rims and six tyres. Nevertheless, the current description does not specify their size, offset, load rating or tread model. The final order should list these details before production and shipment.
Wheel fitment must match the portal hubs, fender width and finished suspension geometry. In addition, technicians should check steering clearance and tyre movement through the full suspension range. A static visual check alone cannot confirm safe fitment.
Custom suspension calibration may form part of an optional project scope. However, the exact setup depends on vehicle weight, intended use and selected wheel package. The workshop should document the final alignment and service requirements after assembly.
Compatibility and Donor Vehicle Verification
This package targets the classic W463 platform. Mercedes-Benz introduced model series 463 in 1989, and the platform received many mechanical and exterior updates during its long production life. Therefore, the model code alone does not confirm every mounting point or drivetrain detail.
Check the VIN and Existing Configuration
Before ordering the six-wheel limousine conversion, send the VIN, production year, engine, transmission and wheelbase. Also provide clear photographs of the frame, axles, underbody, suspension and rear cabin.
The donor may already have facelift parts, suspension changes or previous repairs. Consequently, visual appearance alone cannot confirm compatibility. Kubay Design should review both the VIN and the physical vehicle before approving production.
Do Not Confuse Earlier and Later Platforms
This package does not automatically suit W460, W461, W463A or W465 vehicles. Those platforms use different body, frame, suspension or electronic layouts. In particular, the redesigned 2018+ vehicle uses a wider body and independent front suspension.
For that reason, parts from the modern generation should not be mixed with the classic donor without separate engineering. A written compatibility review protects both the customer and the installation workshop.
Optional Luxury Interior Conversion
Kubay Design offers a full luxury cabin conversion from $24,000. This option is separate from the standard kit. It can include a custom seating layout, VIP trim and selected materials according to the approved client brief.
First, the client chooses the general layout and design direction. Next, Kubay Design records the materials, colours and equipment in a written specification. Therefore, the final interior scope remains clear before production begins.
The standard product description does not define seat functions, leather grades, multimedia equipment, ambient lighting or partition systems. These features count as included only when the final quotation lists them.
Professional Assembly at the European Workshop
Optional professional assembly is available for $20,000 at the Kubay Design workshop in Poland. The listed build period is approximately two months. However, donor condition, selected options and client approvals may affect the schedule.
The assembly service should cover only the work stated in the confirmed quotation. Paint, interior work, transport, registration, certification and unexpected donor repairs may require separate pricing.
Recommended Workshop Process
- Inspect and measure the donor before disassembly
- Confirm the supplied package against the packing list
- Align the reinforced frame and additional axle
- Trial-fit the closed rear body and windows
- Install suspension, drivetrain and brake components
- Check wheel clearances and body alignment
- Complete paint, trim and final assembly
- Test mechanical and electrical functions
During final checks, the workshop should inspect fasteners, fluid lines, brake connections and drivetrain movement. Finally, technicians should complete alignment and controlled road testing before delivery.
Legal Approval and Completed-Vehicle Testing
A six-wheel limousine project changes the donor vehicle’s length, axle count, mass distribution and body structure. As a result, local authorities may require inspections, engineering reports or registration changes.
Rules vary by country. They may cover brakes, lighting, dimensions, passenger restraints, tyre coverage, emissions, noise and maximum authorised mass. Therefore, the customer should confirm the legal process before fabrication starts.
The product page does not state that universal road approval or country-specific certification is included. Likewise, it does not publish a certified passenger capacity, payload, towing limit or top speed for the completed build.
Worldwide Shipping and Delivery Planning
Kubay Design can arrange international courier or container shipment. The best method depends on package dimensions, total weight and destination. Large body and frame parts may require a crate, suitable unloading equipment and customs preparation.
The page mentions express courier service and sea-container delivery. However, the fixed delivery time may differ by carrier, customs clearance and destination. Therefore, the final quotation should confirm the shipping method, insurance and expected transit window.
Customers may also collect the package or completed vehicle from the European workshop. Before transport, both parties should confirm loading requirements, documentation and responsibility for customs charges.
Body Alignment and Final Surface Preparation
The closed rear section should remain in trial-fit condition until the workshop confirms the main reference points. These include the roof line, side opening, rear window position, wheel centres and lower moulding line. Otherwise, early paintwork may hide alignment problems or make later correction more expensive.
After the main geometry receives approval, the workshop can complete seam sealing, corrosion protection and surface preparation. In addition, technicians should confirm drainage routes around the panoramic windows and lower body sections. Water should not remain trapped inside closed structural areas.
Carbon components require a separate inspection. Clear-coated surfaces may need polishing, while paint-ready parts may need controlled sanding and compatible primer. Therefore, the body shop should identify the intended finish before it starts preparation.
Maintenance After the Conversion
The completed vehicle requires a project-specific service plan. Portal hubs, driveshaft joints, suspension fasteners and brake connections need regular inspection. Moreover, the longer body and additional axle create more mounting points than the original donor.
After the first controlled road use, the workshop should check fastener torque, fluid leaks, bearing play and unusual vibration. It should also inspect tyre wear and wheel alignment. Early checks can reveal minor settling before it develops into a larger problem.
Service intervals depend on the selected components and intended use. For example, frequent off-road driving may require more regular inspections than occasional road use. Kubay Design should document the confirmed fluids, wear parts and maintenance requirements within the final project file.
Information Required Before Ordering
A clear technical brief helps avoid incorrect parts and delays. Before the quotation, send the donor VIN, production year, engine, transmission and current wheelbase. Also explain whether the vehicle will serve as a private limousine, a show build or another approved use.
- VIN and registration-market information
- Exterior and underbody photographs
- Current suspension and wheel specification
- Preferred exterior finish
- Requested interior layout
- Destination country and shipping method
Kubay Design can then define the package, optional work and delivery format. Consequently, the customer receives a more accurate quotation and the workshop receives a clearer production plan.
Plan Your Custom Limousine Project
The carbon six-wheel limousine kit combines an extended closed body, a reinforced structure, portal components and premium exterior details. It suits customers who want a rare VIP vehicle, an exclusive show build or a bespoke luxury project.
Explore the six-wheel parts collection, browse classic model upgrades, or review completed projects. You can also learn more about Kubay Design.
Before payment, read the payment terms, shipping information and returns policy. Finally, send the VIN and project requirements through the contact page to confirm compatibility, package contents and optional services.
