The nursing home alerted authorities that the aging metalheads were missing from the center.
Police reportedly found the elder pair at around 3am, with police officials stating they were "disoriented and dazed".
"They were then taken to the medical tent on the festival site and were sent back by taxi at around 6:30 a.m.", Berndt told The Washington Post on Monday.
The pensioners were reluctant to go when they were found in the crowd at 3am.
New Ebola outbreak confirmed in Democratic Republic of Congo
Researchers have not yet identified the particular strain of ebola causing the new outbreak. Travel into and out of the village has been blocked.
It was a pretty hardcore festival, with bands such as Cannibal Corpse, Die From Sorrow and Centuries of Decay on the lineup.
Elderly people are presumed to enjoy the peace and quiet.
You're never too old. It took a bit of convincing, but the two were eventually escorted back to their nursing home with the help of a taxi and a patrol vehicle.
Speaking to media organisation Norddeutscher Rundfunk, the spokesperson added: "They obviously liked the metal festival".
Visitors in costumes are seen at the Wacken Open Air festival.