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Mercedes Benz U 45

Built: 1968–1971 · Series: 421

More machines from model year 1968

Source: https://www.technikboerse.com/gebraucht/traktor-357/mercedes

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With the U 45, Mercedes Benz offers a model from the 421 series. Production: 1968–1971. The engine delivers 45 hp (33 kW), has 4 cylinders, with a displacement of 2,197 cm³. Rated speed is 3,000 rpm. The machine is 4,005 mm long, 1,865 mm wide and 2,180 mm high. The unladen weight is 2,700 kg. The wheelbase measures 2,250 mm. Ground clearance is 395 mm. Top speed is 53 km/h. The tank holds 75 litres. Transmission: 6 / 2, vollsynchronisiert. Tyres: front 10,5-18, rear 10,5-18. The fuel is diesel. Construction: Universal Nutzfahrzeug. There are also 2 reverse gears. Rated output across the Mercedes Benz range ranges from 24 to 299 hp; the U 45 sits at the bottom of that range with 45 hp. Its immediate neighbours are the U 40 below it with 40 hp and the U 600 above it with 52 hp. Rated output across the Mercedes Benz range ranges from 25 to 299 hp; here the U 45 sits at the bottom of that range with 45 hp. 8330 Mercedes Benz models across 126 series are on record.

Mercedes-Benz Unimog U 45 of series 421: a four-cylinder diesel implement carrier producing 33 kW (45 hp), built 1968 to 1971, with an unladen weight of 2,700 kg and a top speed of 53 km/h.

The U 45 of series 421 belongs to the lighter Unimog (Universal-Motor-Gerät) series from Mercedes-Benz. The specific vehicle recorded here dates from 1968 to 1971, a light-duty example.

Read on 3 more paragraphs

The U 45 is powered by a four-cylinder diesel engine with 2,197 cm3 displacement, producing 33 kW (45 hp) at a rated speed of 3,000 rpm. At an unladen weight of 2,700 kg, a wheelbase of 2,250 mm and a width of 1,865 mm, it reaches a top speed of 53 km/h. Height and length are 2,180 mm and 4,005 mm.

With a compact four-cylinder engine and a high rated speed, the U 45 is built for the lighter end of the Unimog range, typical for municipal services, winter road maintenance and smaller farms. As with other Unimog series, portal axles give high ground clearance off-road, and power take-offs front and rear allow work with changing front- and rear-mounted implements as tasks require.

When buying a late-1960s Unimog U 45, check the portal axles and their reduction gearing for oil level and leaks, as well as the function of the front and rear power take-off couplings. The four-cylinder engine is worth checking for compression and oil consumption, and after decades of winter road-salting duty the frame needs a thorough check for corrosion, particularly around the implement mounting points and the load-bearing crossmembers.

Sources: SpecCodex-Register: Kennwerte des Modells Mercedes-Benz Unimog U 45

Technical data

Engine

Fueldieselcorrect
Power45 hp (33 kW)correct
Rated speed3,000 rpmcorrect
Cylinders4correct
Displacement2,197 cm³correct

Dimensions and weights

Length4,005 mmcorrect
Width1,865 mmcorrect
Height2,180 mmcorrect
Wheelbase2,250 mmcorrect
Ground clearance395 mmcorrect
Unladen weight2,700 kgcorrect

Drivetrain and chassis

Drivefour-wheel drivecorrect
Gearbox6 / 2, vollsynchronisiertcorrect
Reverse gears2correct
Front tyres10, 5-18correct
Rear tyres10, 5-18correct
Top speed53 km/hcorrect

Working data

Fuel tank capacity75 lcorrect

Origin and approval

ConstructionUniversal Nutzfahrzeugcorrect

Where this model stands

Power-to-weight ratio: 12.2 kW/t (33 kW / 2.7 t)

Power class: Universal (40–100 hp)

Stronger than 29% of the tractors in the register — out of 15,663 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the Mercedes Benz U 45 have?

The Mercedes Benz U 45 delivers 45 hp.

How much does the Mercedes Benz U 45 weigh?

The unladen weight is 2,700 kg.

What engine does the Mercedes Benz U 45 have?

4 cylinders, 2,197 cm³ displacement, Diesel.

How fast does the Mercedes Benz U 45 go?

Top speed is 53 km/h.

What are the dimensions of the Mercedes Benz U 45?

4,005 mm × 1,865 mm × 2,180 mm.

When was the Mercedes Benz U 45 built?

Production years: 1968–1971.

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.
  • Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
  • Shift the gearbox cold and warm — jumps only show up at temperature.
  • 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 21 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.

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