6 (Sonderkraftfahrzeug[a] 6) was a half-track military vehicle used by the German Wehrmacht during the Second World War.

Development of a new medium artillery tractor began in 1934 at Büssing-NAG, in Berlin.

The vehicle, produced in around 750 units until 1942, could carry up to 11 men in three rows, covered by a canvas structure.

As well as a tractor for the 10.5 leFH 18 howitzer, the vehicle was to be used to tow heavy equipment for engineer units.

6 was used by the various German military forces (Army, Waffen-SS, Luftwaffe) for the entire war.