Uwe Petrunky, a lawyer for the 52-year-old officer, told the court his client suffered "temperature shock" as a result of investigating reports of a peeping tom using recording devices in an Erding sauna while the officer was dressed for winter weather, The Local.de reported Wednesday.
The civil court heard the December 2010 incident left the officer with symptoms including nausea, dizziness and damage to his ears.
A police doctor confirmed the ear damage, but was unable to tie it to "temperature shock."
The judge rejected the man's lawsuit against the police department, saying he was not convinced the officer's troubles were tied to "temperature shock."
"I can't find this term anywhere," he said of the alleged condition.