Merkel is a Wehrmacht corporal serving under Captain von Hecht. He leads a patrol to search for the missing American soldier Captain Turner. He soon regrets finding him. After he and his men split up, he finds some of the children assisting Turner hiding in the bushes after hearing one of the them crying.

He turns to yell for his subordinates when suddenly Silvio leaps up to attack him. Merkel's response is swift, using the folding stock of his MP40 to slash Silvio across the face, badly injuring him. Before he can finish the boy off, Turner rushes in fromt behind and drives his combat knife into Merkel's back, killing the corporal instantly. Merkel falls dead, and, as his men come rushing up, Turner uses Merkel's dropped gun to shoot them all dead.