Mine was made by a bloke named Björn. Not the most German name, but then I met a German guy on holiday called Sven, so I guess Scandinavian names aren't a total rarity in Germany.
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I had to email the AMG Private Lounge people as I couldn't figure out what the signature said... It's Jannick Franzmann, not seen his name mentioned anywhere yet
I realise I am late to the party so to speak however my engine is built by Jannick Franzmann also (GTC Roadster) and it turns out he is also a black series engine builder -