Starting around 1978, 316 of them were upgraded with additional armour and a new missile system, and redesignated as Raketenjagdpanzer Jaguar 1.

The vehicle was armed with two launch rails for the Nord SS.11 antitank guided missile, and two MG3 machine guns.

The Raketenjagdpanzer 2 carried fourteen missiles, twelve of which were mounted in containers inside the vehicle while the other two were attached to the launch rails.

From 1968 forward, the tank destroyer companies of the Panzergrenadier (armored infantry) brigades were equipped with eight of these vehicles.

At the same time, tank destroyer companies of the Panzer brigades received thirteen Raketenjagdpanzer 2.