Lets not forget that halftrucks were used as a great recon units. If spoted they were fast to run from stronger units.
Here are some uses - from Wicikpedia:
There were 23 official variants, and sundry unofficial variants. Each variant is identified by a suffix to the model number. There was however some overlap in the variant numbers.
Sdkfz 251/1 - Schützenpanzerwagen. Standard personnel carrier.
251/1-I - As above, but with intercom facilities
251/1-II - Rocket launcher (called "Stuka zu Fuß" (Walking Stuka) or Wurfrahmen 40) equipped with six side mounted frames for launching 280 mm or 320 mm Wurfkoerper rockets.
SdKfz 251/1 - Falke Infrared detection equipment, to be used in combination with SdKfz 251/20 Uhu. Mostly Ausf. D variants.
Sdkfz 251/2 - Schützenpanzerwagen (Granatwerfer). 81 mm Mortar carrier
Sdkfz 251/3 - mittlere Kommandopanzerwagen (Funkpanzerwagen). Communications vehicle, fitted with extra radio equipment for command use in Ausf. C and Ausf. D versions.[2]
251/3 I FuG8 and FuG5 Radios
251/3 II FuG8 and FuG5 Radios
251/3 III FuG7 and FuG1 Radios
251/3 IV FuG11 and FuG12 Radios (with 9 m telescopic mast); Command vehicle variant (Kommandowagen)
251/3 V FuG11 Radio
Sdkfz 251/4 - Schützenpanzerwagen für Munition und Zubehör des leIG18. Gun-towing tractor, initially for use with the 7.5 cm leichtes Infanteriegeschütz 18. Later used with the 50 mm Pak 38, 75 mm PaK 40 and 10.5 cm leFH 18 Light Field Howitzer.
Sdkfz 251/5 - Schützenpanzerwagen für Pionierzug. Assault Engineer vehicle with inflatable boats, assault bridges. Command Vehicle for Pioneer platoons (Pionierzug).
Sdkfz 251/6 - mittlere Funkpanzerwagen (Kommandopanzerwagen). Command version equipped with map boards, cipher and encoding machines in versions Ausf. A and Ausf. B.
Sdkfz 251/7-I - Pionierpanzerwagen. Another assault engineer vehicle with fittings to carry assault bridge ramps on the sides.
251/7-II - As above but with different radio.
Sdkfz 251/8-I - Krankenpanzerwagen. Armoured ambulance.
251/8-II - As above but with different radio.
Sdkfz 251/9 - Schützenpanzerwagen (7.5 cm KwK37). Equipped with a 75 mm L/24 low velocity gun, nicknamed "Stummel" ("stump").
Sdkfz 251/10 - Schützenpanzerwagen (3.7 cm PaK). Equipped with a 37 mm Pak 36 anti-tank gun mount. Platoon commander's variant.
Sdkfz 251/11 - Fernsprechpanzerwagen. Telephone line layer.
Sdkfz 251/12 - Messtrupp und Geratpanzerwagen. Survey and instrument carrier for artillery units.
Sdkfz 251/13 - Schallaufnahmepanzerwagen. Sound recording carrier for artillery units.
Sdkfz 251/14 - Schallaufnahmepanzerwagen. Sound recording carrier for artillery units.
Sdkfz 251/15 - Lichtauswertepanzerwagen. Flash spotting carrier for artillery units.
Sdkfz 251/16 - Flammpanzerwagen. Fitted with two flame projectors and initially a rear mounted flamethrower, detachable but still connected to the vehicle, to be operated by dismounted infantry. This was in addition to the standard MG34 machine gun and mount. Six Sd.Kfz. 251/16 Flammpanzerwagens were authorised for issue to each Panzergrenadier regiment.
Sdkfz 251/17 - Schützenpanzerwagen (2 cm FlaK38). Anti-aircraft use with either a 20 mm Flak 30 or Flak 38. Also a variant called "Schwebenlafette".
Sdkfz 251/18-I - Beobachtungspanzerwagen. Artillery observation vehicle.
251/18-Ia - Differences unknown, likely different radio fit.
251/18-II - Armored observation vehicle.
251/18-IIa - Different radio.
Sdkfz 251/19 - Fernsprechbetriebspanzerwagen. Telephone exchange vehicle.
Sdkfz 251/20 - Schützenpanzerwagen (Infrarotscheinwerfer) Uhu Mounted an Infrared searchlight for night fighting.
Sdkfz 251/21 - Schützenpanzerwagen mit Fla MG Drilling. Equipped with a triple-mount ("Drilling" in German means "triple") of MG151 autocannon; early version being MG151/15 mm cannon, later being MG151/20 mm Luftwaffe cannon.
Sdkfz 251/22 - 7.5 cm PaK40 L/46 auf Mittlerem Schützenpanzerwagen. Fitted with a 75 mm PaK 40 anti-tank gun.
Sdkfz 251/23 - 2 cm Hängelafette 38 auf Mittlerem Schützenpanzerwagen. Recon version, rare- same turret as a 234/1 or a 222.[3]
