Mercedes Benz UNIMOG 421
Built: 1956–1995 · Series: Other models
More machines from model year 1956
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Mercedes-Benz – other models: the collective page of the MB-trac and Unimog outside the named ranges, from the MB-Trac 700 to 1500 and the Unimog 421/425, 48 to 115 kW, four- to six-cylinder
This page gathers the Mercedes-Benz tractors the register could not assign to a named range – above all the MB-trac range and the Unimog 421 and 425 models registered as tractors. The MB-trac was built from the 1970s at the Gaggenau plant, with a centrally mounted cab and equal-size wheels front and rear for even axle loading with implements front and rear; the type number (MB-trac 700, 1000, 1500) roughly gives the power class. The Unimog, originally designed as a universal agricultural implement carrier and built by Mercedes-Benz since the 1950s, shares axles and part of the drivetrain with the MB-trac.
Read on 3 more paragraphs
The register lists here 12 versions with 48 to 115 kW (65 to 150 hp) from four- to six-cylinders of 2,404 to 5,950 cm³, unladen weights from 3,280 to 9,095 kg, gross weights from 6,000 to 10,000 kg, a height of 2,650 to 3,050 mm, torque from 216 to 499 Nm at 2,400 rpm.
In the 1970s and 1980s the MB-trac was the technically most advanced answer to the classic field tractor, with high pulling power, a low centre of gravity and the ability to carry implements front and rear at the same time; it remained sought after especially in viticulture, forestry and municipal service, while the Unimog served in parallel as a universal vehicle.
On used MB-tracs and Unimogs, rust on frame and cab, the condition of the hydropneumatic suspension and propshafts, engine condition and compression, the tightness of the numerous hydraulic connections and the completeness of the front and rear implement interfaces all count; parts run through Mercedes-Benz Unimog specialists and independent MB-trac workshops.
Sources: SpecCodex register, model data: Mercedes-Benz (weitere Modelle)
Technical data
Engine
| Cylinders | 4correct |
|---|---|
| Displacement | 2,404 cm³correct |
Dimensions and weights
| Length | 4,000 mmcorrect |
|---|---|
| Width | 1,800 mmcorrect |
| Wheelbase | 2,280 mmcorrect |
Drivetrain and chassis
| Wheels | 4correct |
|---|
Frequently asked questions
What engine does the Mercedes Benz UNIMOG 421 have?
4 cylinders, 2,404 cm³ displacement.
What are the dimensions of the Mercedes Benz UNIMOG 421?
4,000 mm × 1,800 mm.
When was the Mercedes Benz UNIMOG 421 built?
Production years: 1956–1995.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 8 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.
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Other models in this series
Sources: RDW — Dutch national vehicle register (retrieved August 2026) · How we check the data
Tractor in 3D section
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