Mercedes Benz UNIMOG U 125
Built: 1977 · Series: UNIMOG
More machines from model year 1977
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
Unimog — the name is a blueprint, the track width two potato rows
Unimog is an acronym: UNIversal-MOtor-Gerät, universal motorised implement. The name describes exactly what the vehicle was meant to be — not a truck, not a tractor, but an implement carrier able to do both. It was invented by Albert Friedrich in the hard years straight after the Second World War.
Read on 4 more paragraphs
One detail reveals its origin better than any description: the track width of 1,270 mm was chosen because it matches the width of two potato rows. The Unimog was first of all an agricultural machine. To that came two power take-off shafts of 22 hp each for implements and all-wheel drive with separately engageable axles.
Technically defining are the portal axles. They place the half-shafts above the wheel centre, raising ground clearance considerably — the reason a Unimog still moves where others ground out.
In 1953 the 401 and 402 series brought substantial developments, including for the first time a closed, impact-resistant all-steel cab in place of the previous folding roof. From 1963 a medium-duty range followed under the designation 406, with a longer wheelbase of 2,380 mm and more than twice the engine output of the 401.
Anyone assessing a used vehicle should therefore identify the series number first. It says more about size, power class and intended use than any equipment list — between a 401 and a 406 lie ten years and an entire vehicle class.
Sources: Mercedes-Fans, Unimog-Museum, Wikipedia: Unimog 406 (Wikipedia)
Technical data
Engine
| Cylinders | 6correct |
|---|---|
| Displacement | 5,675 cm³correct |
Dimensions and weights
| Length | 5,550 mmcorrect |
|---|---|
| Width | 2,100 mmcorrect |
| Wheelbase | 2,900 mmcorrect |
| Unladen weight | 4,130 kgcorrect |
| Gross vehicle weight | 6,750 kgcorrect |
Drivetrain and chassis
| Wheels | 4correct |
|---|
Frequently asked questions
How much does the Mercedes Benz UNIMOG U 125 weigh?
The unladen weight is 4,130 kg.
What is the gross vehicle weight of the Mercedes Benz UNIMOG U 125?
6,750 kg.
What engine does the Mercedes Benz UNIMOG U 125 have?
6 cylinders, 5,675 cm³ displacement.
What are the dimensions of the Mercedes Benz UNIMOG U 125?
5,550 mm × 2,100 mm.
When was the Mercedes Benz UNIMOG U 125 built?
Production years: 1977.
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.
- Check the weights in the papers against the figures here — attachments change them.
- 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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
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This page carries 10 individual figures for this model. They come from 2 recorded sources; 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
MERCEDES UNIMOG U400
UNIMOG
UNIMOG - S
UNIMOG 1300 L
UNIMOG 1300L
UNIMOG 1350L
UNIMOG 1450
UNIMOG 404
UNIMOG 404113
UNIMOG 405/10
UNIMOG 405/12
UNIMOG 405/40
Sources: RDW — Dutch national vehicle register (retrieved August 2026) · How we check the data
Truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.
