1944
Announcement of the Morgenthau Plan; Albert Friedrich conducts the first studies on an agricultural vehicle with all-wheel drive and forward control.

1945
May, establishment of the criteria for building a Unimog. August, first contacts with Erhard & Söhne. September, first plan by Friedrich. December, Albert Friedrich (former chief engineer of Daimler-Benz's aircraft engine research division) started developing a highly specialised vehicle for agriculture. His concept was for a four-wheel drive, self locking differentials, high ground clearance (by rigid portal axles), with power take off at the front and rear, a small loading platform, a driver's cab for two people, extremely low speed for working in the fields, and with highway capability for up to 50 km/h (30 mph). The project started in a factory at Schwäbisch Gmünd, in southern Germany, in the Gold und Silberfabrik Erhand & Söhne. The company had never before been involved in making vehicles or tractors.

1946
January, Rößler starts work at Erhard & Söhne under Friedrich. March 6th, first concrete Unimog concept. October, the first prototype, equipped with a 4-cylinder, 1.7 liter (103 cu. in.) gasoline engine was complete. Still lacking in 1946 was a good quality diesel engine and the name for this new vehicle, which was neither a truck or a tractor. The name problem was soon solved by Hans Zabel, an engineer with the firm. He created an acronym from the name: UNIversal-MOtorGerät (universal-power-unit) or UNIMOG.

1947
Spring, the Boehringer brothers take over the Unimog team, production and sales. Erhard & Söhne remains the supplier for many parts. The first diesel engines are delivered, the 25 hp Daimler-Benz OM 636, which was also used in their 170D car. Autumn, procurement of materials for the planned preliminary series of 100 vehicles. The first UNIMOG saw intensive testing and the results confirmed the concept.

1948
Unimog is introduced at the LG-Schau (trade show) August 29th in Frankfurt/Main. The first 150 orders. Summer, final preparations for production of the series. The UNIMOG team now searched for a new plant. In the autumn of 1948 they moved to the Werkzeugmaschinenfabrik Boehringer factory which became the new manufacturing plant for UNIMOG. In the following two years about 600 Unimogs (U 25) were produced.

1949
Delivery of the first Boehringer Unimog Model 70200 begins in March. When production is running, an additional series of 500 vehicles is planned.

1950
By autumn 1950, 600 Unimogs are built by Boehringer. Negotiations are held in autumn about the take-over by Daimler-Benz. Now Boehringer can manufacture machine tools once again. The French army occupation forces in south-western Germany ordered the first military Unimogs. In 1950-51 they purchased 400 of the U 25 model.

1951
In May Daimler-Benz took over the Unimog Division from Boehringer. June 3rd , first delivery of the Daimler-Benz Unimog Model 2010, manufactured in Gaggenau. By July 10th the 100th Unimog had left the assembly line. DLG Silver Medal, the association's highest award.

1953
March, first Unimog with closed all-steel cab. Unimog is awarded a gold medal at the Rationalisierungsausstellung (efficiency exhibition) in Düsseldorf. 31 July, production of Model 2010 25 PS is discontinued. 3 August, the first Model 401 rolls off the belt.

1954
Unimog is the first tractor to receive the seal of approval from the Forsttechnischen Prüfungsausschuss (forestry technology examining board).

1955
May, the first Unimog S with long wheel base and modified gasoline car engine rolls off the belt. It was a 1-1/2 ton vehicle with a 2900 mm (114 in.) wheel base, 82 hp, 6-cylinder gasoline engine (2.2 liter (134 cu. in.)) from the Daimler Benz's 220 car, and a 24 volt electrical system. Due to its portal axles the 404 had a ground clearance of 40 cm (15.7 in.), much more than the Dodge M 37. Speed ranged from 1.5 km/h up to 95 km/h (0.9 mph to 59 mph). Unofficially some of them ran at speeds up to 110 km/h (68 mph). The fuel specification called for regular gasoline with a minimum octane rating of 80. Cross country the UNIMOG is unbeatable with its portal axles, front and rear differential locks, 6 forward, 2 reverse gears, and an angle of departure of 46 degrees. Three variations of the UNIMOG S were produced; the 404 (open cab with folding canvas), the 404.1 (closed metal cab) and later the 404.0 (closed metal cab first launched in 1963 as the 406 model). Typical configurations were troop carrier, radio communications, ambulance, pioneer, fire fighting, and snow removal.
Autumn, the ox head is replaced by a star on the bonnet.

1956
August, engine performance is increased from 25 to 30 hp, and the series 411 appeared as a replacement for the series 401/402.

1957
The Unimog is available with optional fully-synchronised transmission. September, new closed cab for the Unimog with long wheel base.

1959
Unimog becomes the first agricultural tractor with synchronised transmission as a standard feature.

1961
May, over 50,000 Unimogs are manufactured.

1962
The Unimog series 406 was introduced in July, the first model in this series was the U 65.

1963
May, the first Unimog 65 hp is ready. Unimog-based chassis/cab became available for special vehicles.

1964
June, the first Unimog 65 hp with direct-injection engine is built.

1965
Presentation of the series 416, starting with the U 80.

1966
Presentation of the series 421 in January, starting with the U40. Presentation of the series 403 in April, starting with the U 54. May, the 100,000th Unimog rolls off the belt in Gaggenau.

1968
Expanded range: U 34, U 45, U 54, U 66, U 80, U 90 and Unimog S for the civilian sector. Manufacture of the series 426 under licence began in Argentina.

1969
Presentation of the series 413 in January, starting with the U 80. Series 431 Unimogs also manufactured under licence in Argentina.

1970
Overroll bar standard for the open Unimog.

1971
The 150,000th Unimog rolls off the belt in Gaggenau and is donated to charity.

1972
New range: U 34, U 52, U 66, U 84 chassis with 90 hp and 100 German standard hp. Unimog (1.5 t truck) with 82 and 110 hp gasoline engine. The MB-trac, a version of the Unimog further developed especially for the farmer, is launched.

1974
Presentation of the series 425, starting with U 1300.

1975
Unimog road tractor with 150 hp.

1976
Expansion of the range: U 1000, change to new model names U 800 - U 1300. Larger and more powerful than the U 404; the U1300L, which were offered to the German Bundeswehr, had a liquid cooled, 6-cylinder, 130 hp, OM 352 diesel engine, 8 forward and 8 reverse transmission, 3250 mm (128 in.) wheel base, 440 mm (17.3 in.) ground clearance at the portal axles, differential locks, 46 degree angle of approach, empty weight 5250 kg (11,574 lbs.), maximum loaded weight 7500 kg (16,534 lbs.), and a steel cab.

1977
In December the Bundeswehr ordered the new 2 ton trucks at Gaggenau, named Lkw 2t tmil gl(W), Typ U 1300 L.

1978
Beginning in August Daimler-Benz delivered 17,000 cargo versions to the Bundeswehr. A total of 22.000 vehicles were ordered. The 200 000th Unimog is produced in September.

1980
Production of the U 404 (Unimog S) is phased out.

1984
The 250 000th Unimog is produced.

1985
Introduction of the Light and Medium-duty Ranges 407 and 427.

1986
Start of series 419 production for the US Army. Production of the series 436 started in Aksaray, Turkey.

1988
Complete revision of the Unimog product programme, with introduction of the series 407, 417, 427 and 437 in rapid succession.

1991
New top model U 2150.

1992
On May 9th the new Unimog 408 (U 90) and 418 (U 110, U 140) series were exhibited at the German "IAA" commercial vehicle show in Hannover.

1993
Presentation in July of the U 2400 TG heavy-load carrier (series 437). Trials of the first three-axle Unimog (6 x 6).

1994
The 300 000th Unimog is produced.

2000
On March 13th presentation of the new Unimog U 300 and U 400 series. On September 21st completion of the new range with the U 500, shown at the commercial-vehicle "IAA" in Frankfurt/Main.

2001
In June 50th anniversary of the Mercedes-Benz Unimog and open day at the DaimlerChrysler plant in Gaggenau.