When it comes to German shipwrecks, there are two well known examples. Or, well, two *intact* examples. Bismarck, obviously. And Graf Zeppelin, less obviously.
The former wreck is very well surveyed, as you could expect. Graf Zeppelin has a lot of sonar surveying, and quite a few dive videos. However, the wreck lacks a good ROV survey like Petrel did in the Pacific.
Nonetheless, this is still an interesting wreck to look at. Even if on the shorter end for one of these videos.
A Selection of Dive Videos:
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Sonar:
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Pictures:
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