Vietnam war era M274 Mechanical Mule 4x4 1/2 ton utility vehicle.
Controls:

Group 1: Driving mode. Forwards / backwards on pitch, steering on elevator.

Group 2: Firing mode. Pitch and roll control the howitzers orientation. VTOL folds down the steering rack to drive while not sitting in it or to have more room to move the howitzer.

Group 3: Lights.

The Mechanical Mule was developed after WW2 by Willys-Overland Motors to be a highly durable and simple form of transportation. Could be loaded with half a ton of weight or 4 people. It could be equipped with heavy machine guns, howitzers or mortars via a multifunction montage point in the middle of the vehicle. It could also be used as a carrier vehicle for goods like ammunition, technical equipment or other miscellaneous things. It had a 18 HP 4 Cyl or 2 Cyl engine (this one has the older 4 Cyl version), which propelled it via a 3 speed manual unsynchronised transmission to a moderate 40km/h (thats 25 bald eagles per orange ex-president for you muricans).
The Mechanical Mule also did not have any sort of suspension to make it lighter and easier to produce, but only relied on low pressure tires.

Had to re-post with a few modifications to further match the criteria.