Company of Heroes 2: OKW Commander - Elite Armor Doctrine

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

OKW Commander: Elite Armor Doctrine;
Use superior equipment and experienced crewmen to augment your armored forces. Plan your tactics with Signal Relay or recover your armor with an Emergency Repair. Use the Sturmtiger to spearhead the assault.

Signal Relay
Boosting signal range briefly reveals enemy vehicles on the minimap.
Emergency Repairs
Vehicle crews gain the ability to repair critical damage on their vehicles. The crew is very vulnerable during this repair procedure.
High Explosive Anti-Tank (HEAT) Shells
Tanks are now issued HEAT ammunition for increased penetration.
Panzer Commander
The Panzer IV, Panther & King Tiger can be upgraded with a Panzer Commander that can survey the battlefield and call in coordinated artillery strikes.
Sturmtiger
The Sturmmörserwagen 606/4 mit 38cm RW 61, more commonly known as the Sturmtiger, is an assault vehicle capable of firing a 376kg rocket-assisted shell devastating to enemy force concentrations or structures.