Just to clarify the google translation, here is a "human" translation of some of the important bits of that article:
The article actually says that one body has been recovered, the rest are presumed dead but not yet recovered, because the lake is 80m deep at the crash site.
According to unconfirmed reports about noon, a second man was rescued from the Achensee.
This paragraph actually says "retrieved", as in "body retrieved", not rescued. No survivors.
"Contact with the helicopter was lost some minutes before the crash."
"The 41 year old pilot had about 2,500hrs of flight time and was considered a experienced pilot. The EC135 helicopter, at 1,300hrs, was relatively new."
The last paragraph says:
"At first, the helicopter was circling", said eyewitness Georg Pittl. "Then he pulled in low over the trees. I saw that he was descending the whole time. Like a glider plane, he bounced off the water, then crashed into the lake. The helicopter sank immediately."