From the article:
The Panzergrenadier regiments are the assault infantry of the German armoured divisions and the Armoured (or Gepanzert) Panzergrenadiers are the hard spearhead of any infantry assault. They are noted for their speed, mobility, and great firepower. Because they're part of a Panzer Division they cooperate closely with the tanks of the Panzer Regiment.
Armed with two MG-42 machine-guns for each squad the Panzergrenadier Platoon can unleash a substantial volume of firepower. Mounted in their armoured Sd Kfz 251/1 half-tracks they travel into battle. They can fight on foot or assault from their vehicles.