Mercedes-Maybach G 650 Landaulet (W463, 2017) Tuning & Preservation Guide 2026 — Body, Wheels & Interior

The Mercedes-Maybach G 650 Landaulet (W463, 2017) is the most exclusive G-Wagen ever built — a 99-unit limited run that combined the portal-axle chassis of the G 500 4x4² with a stretched wheelbase, a chauffeur partition wall, and an electric fabric convertible roof over the rear passenger cabin. Powered by the M279 6.0-litre twin-turbo V12 producing 630 hp and 1,000 Nm, it was priced at €666,000 new and today trades between £850,000 and £1.6 million depending on provenance. Reported owners include Middle Eastern royalty, Bulgarian oligarchs, and several high-profile collectors — and rumours persist of a single unit commissioned for a European head of state. This guide covers what meaningful work can (and often should not) be done to a Landaulet, from Brabus 6x6-derived upgrades to Carlex and Vilner interior re-trims, and makes the case for preservation as the highest form of tuning.

Specifications

Platform Overview: W463 + Portal Axles + Landaulet Conversion

The G 650 Landaulet sits on the classic W463 ladder-frame, body-on-frame chassis that Mercedes produced from 1990 to 2018 — this is the original long-bonnet G-Wagen, not the 2018+ W463A facelift and not the BMW CLAR luxury unibody (an important distinction for anyone researching parts compatibility). What makes the Landaulet unique is the combination of three separate engineering projects: the 4x4² portal-axle system borrowed from the G 500 4x4², a wheelbase stretched by 578 mm to 3,428 mm (allowing limousine-like legroom in the rear), and a chauffeur divider partition with electrochromic privacy glass separating driver and rear cabin.

The portal axles lift the body roughly 500 mm higher than a stock G63, yielding 450 mm of ground clearance, 1,000 mm of fording depth, and a 54-degree static side-tilt tolerance — genuine extreme off-road capability packaged in a car intended for red-carpet duty. Over the rear seats, an electrically folding fabric convertible roof opens the cabin to the sky while the driver area remains hardtop, echoing the 1960s Mercedes 600 Pullman Landaulet that carried popes and dictators. It is, by any measure, one of the most technically and philosophically peculiar production vehicles of the 21st century.

Rare Tuners Who Will Touch a Landaulet

Because the Landaulet is effectively a rolling collector’s item, the tuning landscape is extraordinarily narrow. Fewer than ten known cars have received any factory-quality aftermarket work, and the shops capable of doing that work can be counted on both hands.

Brabus — G 850 / Rocket V12 crossover components

Brabus in Bottrop is the only tuner with documented V12 upgrades that can transfer to an M279 Landaulet. Their G 850 6x6 Adventure programme — built on the discontinued G63 AMG 6x6 platform — uses a 900 hp Rocket V12 kit with reworked turbochargers, intercoolers, and a full re-map. On the Landaulet, Brabus has been asked (rumoured fewer than three commissions) to retain stock power but fit carbon bonnet vents, widebody arch extensions for the portal-axle track, quad-outlet side exhausts, and bespoke Monoblock forged wheels. Brabus are uniquely qualified because they respect the collector value and will document every change for provenance records.

Mansory — Gronos Evo 6x6 components

Mansory’s Gronos Evo widebody programme, originally designed for the G63 AMG 6x6, shares a handful of bolt-on components that cross-fit the Landaulet: carbon front splitter spoilers, roof-mounted LED light bars, side-step running boards, and carbon-trim door panels. Mansory’s work is more aggressive than Brabus’ and carries higher visual impact at the cost of some originality points on a concours field, but it is undeniably show-stopping. Full Gronos widebody is not recommended for Landaulets — it damages resale.

Carlex Design — bespoke interior re-trim

Polish atelier Carlex Design is the most frequently recommended partner for Landaulet interior work. They specialise in hand-stitched leather, Alcantara headliners, and custom marquetry, and have completed at least one fully verified Landaulet in saddle-brown saddle leather with quilted diamond stitching. Carlex’s work is reversible (a crucial point for collector cars) and they provide hide-provenance certificates.

Vilner — Bulgarian coachbuilt interior bespoke

Vilner in Sofia is Carlex’s closest rival. They have rebuilt several G-Class interiors in exotic hides (ostrich, shagreen, python where legal), offer bespoke wood inlays from burr walnut to piano-black carbon, and integrate modern infotainment tastefully. For Landaulet owners who want personalisation without overt branding, Vilner is ideal.

Stola / Armormax — concealed armouring

Two operators, Stola (Italy) and Armormax (USA), provide VR7-to-VR9 armouring that can be retrofitted to a Landaulet without altering the external silhouette. Armouring the partition wall and passenger compartment is a common request from diplomatic and royal owners; done correctly, it adds approximately 650 kg and costs USD 180,000–260,000, but does not visually compromise the car.

Wheels — Staying True to Portal-Axle Geometry

The Landaulet was delivered on bespoke Maybach 22″ 12-hole forged wheels wrapped in 325/55 R22 tyres (stock Mickey Thompson mud-terrain or OEM Michelin Latitude Sport, depending on spec). The portal-axle hub geometry requires unusually deep offsets and wide barrels, which is why only a handful of aftermarket wheel options physically fit.

The correct upgrade is the Brabus Monoblock M forged in 22″ x 10J ET−12 front and 22″ x 10.5J ET−15 rear — these clear the portal housings, sit flush with the widened arches, and match the OEM load rating. Brabus Platinum Edition finishes (anthracite centre, machined lip) complement the chauffeur-formal aesthetic. Jumping to 23″ is technically possible (Forgiato and ANRKY offer custom-milled one-offs) but sacrifices off-road geometry and ride quality; on a 3,375 kg vehicle with portal axles, 22″ is the engineering sweet spot.

Tyre choice depends on use: Mickey Thompson Baja MTZ 325/55 R22 for serious off-road or film-shoot convoy duty, BFGoodrich All-Terrain T/A KO2 325/55 R22 for year-round compromise, or Pirelli Scorpion ATR 325/55 R22 for city-biased use with a quieter road manner. For preservation (see below), retain the original Maybach wheels and Michelin Latitude Sport rubber.

Preservation vs Performance — The Case Against ECU Tuning

Unlike a G63 W463A, where a Brabus Rocket 900 conversion adds resale cachet, the Landaulet is already at the top of the G-Class hierarchy and any performance modification diminishes its collector value. The M279 V12 is factory-limited to 180 km/h for tyre-load reasons, and unlocking that limit, re-mapping the ECU, or fitting catalyst-delete exhausts will trigger warranty voiding, document flags at any future auction, and a typical 10–20% discount on hammer price at Bonhams, RM Sotheby’s or Gooding.

The practical recommendation for 99% of Landaulet owners is therefore: cosmetic and interior work only. Reversible paint protection film (PPF) in matte or satin, concours-quality leather re-trim by Carlex or Vilner, a subtle Brabus wheel change with original wheels retained in climate storage, and perhaps discreet VR7 armouring. Everything else — engine, exhaust, suspension, portal-axle internals — should be left factory.

Interior — Maybach Rear-Cabin Luxury

Stock, the Landaulet came with two fully-reclining Nappa-leather Business Class seats with massage and heat/cool, solid-wood (burr walnut or piano-black) tray tables, a pair of silver-plated Maybach double champagne flutes, cashmere blankets, and a thermo-controlled rear fridge. Many owners have upgraded to Carlex quilted diamond-stitch leather, a 4K rear screen in the partition wall, Burmester High-End 3D sound, and bespoke marquetry. Vilner regularly installs suede headliners with discreet illuminated fibre-optic starlight. Keep all OEM components — Maybach flutes, original fridge, OEM wood — for eventual concours return.

Future-Proofing the Landaulet Collectible — Why 2026 Is the Year to Commit to Preservation

The G 650 Landaulet represents a permanent, never-to-be-repeated combination of engineering decisions: 99 units, W463 ladder chassis, M279 biturbo V12, portal axles, stretched wheelbase, chauffeur partition, and an electric fabric convertible roof. Every single element of that stack is now extinct in the Mercedes product plan. The 2018+ W463A facelift kept the G-Class name but did not revive the Landaulet body or the V12 option. The third-generation W464 G-Class arriving 2024–2025 is EV-focused (Mercedes EQG with quad motors and tank-turn), and will not return to portal axles or a V12 convertible Landaulet layout — ever. Regulatory pressure on combustion engines, EU 7 emissions, and Mercedes’ own “Ambition 2039” carbon-neutral roadmap make the case airtight.

This scarcity creates a clear appreciation trajectory. The G 500 4x4² (200 units, launched 2015) has already risen from £170k MSRP to £220–320k. The G63 AMG 6x6 (~100 units, 2013–2015) has moved from €379k MSRP to £700k–£1.1m. The Landaulet, at 99 units and with the rarest powertrain in the family, is tracking above both. Best preservation strategy is straightforward: keep mileage below 500 miles per year, store in climate-controlled conditions (18°C, 45% RH), retain the original Maybach 22″ wheels on Michelin rubber, service exclusively at Mercedes-Benz Classic Center Stuttgart or the Sindelfingen factory, and never ECU-tune. Agreed-value insurance at £1.2–1.8 million is now standard at Hagerty, Lockton, and Chubb. A Landaulet bought for £950k in 2026 and preserved correctly is a realistic £2.2–2.8m car by 2035 — provided the provenance chain stays clean.

Frequently Asked Questions

How do I verify the provenance of one of the 99 Landaulets?

Mercedes-Benz Classic in Fellbach maintains a confidential registry of all 99 chassis numbers and their original delivery destinations. For a fee (typically €450–900) they will provide a “Geburtsurkunde” (birth certificate) confirming VIN, original spec, first-owner country, and any factory service history. Cross-reference this with Brabus, Mansory, and Carlex archives if the car has been modified. Any Landaulet sold without full factory documentation should be treated with extreme caution; forged or grey-market builds on G 500 4x4² chassis have been attempted. Authenticate VIN chassis stamping, partition-wall stitching patterns, and the specific Maybach wheel casting marks.

How does the Landaulet compare to the G 500 4x4² and G63 AMG 6x6 for collectibility?

All three are portal-axle halo cars, but the Landaulet is rarest (99 vs 200 and ~100 units), has the most exclusive powertrain (V12 biturbo vs V8 biturbo in the others), and the unique chauffeur-Landaulet concept. The G 500 4x4² is the affordable entry point to the family at £250k–320k. The G63 6x6 is the mechanical extreme at £700k–1.1m. The Landaulet sits above both, trading between £850k and £1.6 million, and appreciation data from RM Sotheby’s auctions 2022–2025 shows it outpacing both siblings by roughly 8–12% per year in low-mileage examples.

Who services the portal axles and how difficult is long-term maintenance?

Portal-axle servicing is specialised. Mercedes-Benz Classic Center Stuttgart, the Graz (Magna Steyr) factory where the G-Class is built, and a handful of marque specialists in the UK (Hartge-trained), Germany, and UAE handle portal-axle oil changes (every 30,000 km), hub-reduction gear inspection, and seal replacement. Budget £3,500–6,000 per major service. Spare portal-hub components are still stocked by Mercedes for the 4x4² and 6x6 range, which protects Landaulet owners for the foreseeable 20–30 years. Avoid independent 4x4 shops unfamiliar with the Magna portal system.

Is armouring a Landaulet legal, and does it affect collectibility?

Armouring legality depends on jurisdiction. In the UK, EU, UAE, and most US states, private VR7 and VR9 armouring is legal without special permit. In Germany, notification to the Kraftfahrt-Bundesamt is required. For collectibility, discreet armouring done by Stola, Armormax, or Texas Armoring Corporation does not significantly affect resale provided the exterior remains unmodified and conversion documentation is retained. Buyers at auction expect a Landaulet purchased by royalty or a government to be armoured, and high-quality VR7 integration can actually enhance provenance narrative. Budget additional insurance and track the 650 kg weight penalty for tyre and brake wear.