Remember C that the German Panzers had on-board radios.

Case in point was the remarkable blowing away of JS II's and T-34's in the spring of 1945 by Karl Bromann and two other Königstiger's of SS Schwere Pz. Abt. 503.

these Tigers had infiltrated Soviet lines and came upon a Soviet armor column. By keeping in close radio contact two of the big heavies obliterated the Soviet armor while the other Tiger occasionaly fired as well but kept the two Tigers covered from the rear

~E