Models

Unimog U25 series U401, produced from 1953 to 1956

1953-1956

1953-1956 Production
6 Number of models
1,767 cc Displacement
1,720 mm Wheelbase

Technical data

Production 1953-1956 Number of models 6
Engine OM 636 (4-cylinder, 1.7-litre, diesel) Power output 18 kW (25 hp) at 2,300 rpm
Displacement 1,767 cc Wheelbase 1,720 mm
Kerb weight 1,825 kg Max. weight 3,150 kg
Payload 1,000 kg Ground clearance 370-450 mm
Turning radius 3,800 mm Gearbox 6+2 speeds, four-wheel drive
Brakes 4-wheel drums, hydraulic Units built 10,928 units

The Unimog made its debut as a Mercedes-Benz vehicle in 1953 at the DLG show in Cologne. The three-pointed star appeared on the front for the first time. The ox-head emblem remained alongside it for a while before disappearing in 1956.

The sales department taken over from Boehringer was gradually absorbed into the Daimler-Benz organisation, for which tractors were initially a new field. More efficient production at the automotive plant helped reduce costs and, as a result, boosted sales. The series designation also changed: 401 now referred to the short wheelbase, 402 to the long wheelbase.

The Unimog U401 was now available in two cab versions: in addition to the open-top square cab that continued to be built, a closed cab version was also offered. Production of this cab was entrusted to Westfalia, a company that would later become primarily known as a manufacturer of motorhome conversions.

Specifications — MERCEDES-BENZ UNIMOG Product Range 401

Variants and model codes

ModelNameCab typeWheelbasePower (hp)Engine
401.101U25Open cab1720 mm25OM 636
401.102U25Open cab1720 mm25OM 636
401.103U25Open cab1720 mm25OM 636
401.104U25Closed cab1720 mm25OM 636
401.105U25Closed cab1720 mm25OM 636
401.106U25Closed cab1720 mm25OM 636

Unimog U25 / U401

Other Unimog U25 models

Unimog 70200 — Launch date: 2/1949

U 2010 — Launch date: 6/1951

U 402 — Launch date: 11/1953

Photo credits: Mercedes-Benz AG