The Borgward IV, officially designated Schwerer Ladungsträger Borgward B IV (heavy explosive carrier Borgward B IV), was a German remote-controlled demolition vehicle used in World War II.

Borgward originally developed the B IV as an ammunition carrier, but it was found unsuitable. It was also tested as a remote minesweeper, but was too vulnerable to mines and too expensive. During the Battle of France, German engineers from the 1st Panzer Division converted 10 Panzer I Ausf Bs into demolition and mine clearing vehicles, using them to place timed charges on bunkers or minefields without losing the vehicle. The Waffenamt found the idea valuable, and ordered the B IV's development as a remote-controlled demolition vehicle. The first vehicles were delivered in 1942.[1]

The Borgward IV was much heavier than the Goliath, and carried a much larger payload. The Borgward IV was operated by radio and the Goliath was wire guided, due to the Borgward IV's much longer range a driver in the vehicle would bring it independently to its destination before dismounting and conducting it to its target by radio. When it reached the target, the vehicle would drop the charge and leave the danger area. This put Borgward IV operators in great danger. While the Borgward IV was armored, its armor was inadequate by 1942-43, and its larger size than the Goliath made it much easier to spot.

https://en.wikipedia.org/wiki/Borgward_IV
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