In advertising it's different. Many advertisers think that the viewers understand English (most educated Germans do) quite OK - so it sometimes happens (more in cinema than in TV) that advertising films are shown in English for the brand to appear more cosmopolitan.

Especially the slogans are often left untranslated. Since some Germans (especially from lower educated classes) aren't as fluent in English as the advertiser assumed, this leads to rather funny missunderstandings, for example:

"Sat 1 - powered by Emotion" was understood as "Sat 1 - Kraft durch Freude" (translated back to English: "Sat 1 - Strength Through Joy")

or

"Esso - we are drivers, too" -> "Esso - wir sind zwei Fahrer" (here, "too" and "two" was confused) -> "Esso - we are two drivers"

or

"Douglas - come in and find out" -> "Douglas - komm rein, du wirst auch wieder herausfinden" -> "Douglas - come in, you will be able to find the way out of the shop then"