I have before buying specially with an employee on the phone told me that subtitles would be switched off. Without further ado, I bought the 4th season because just the original argument posed for sale.
With horror I realized that this does not turn off the subtitles. The series is thus difficult to enjoy because of the annoying German subtitles.
The Amazon customer service is excellent though - I could return the license with full refund!
It's a pity that can not be the U-off title.