How come we missed this one?
If it's all correct, this is a 3,6 liter M103 AMG engine. Quite rare.
Too bad no more images are availible.
I already contacted germancarblog and 4starclassics. But since it's been 7 years ago, they have nothing availible anymore.

1993 Mercedes-Benz G36 AMG | German Cars For Sale Blog
The 1990s was a time of transition at Mercedes-Benz. Model nomenclature evolved from numbers at the beginning of each model to a letter, Porsche was
germancarsforsaleblog.com
If it's all correct, this is a 3,6 liter M103 AMG engine. Quite rare.
Too bad no more images are availible.
I already contacted germancarblog and 4starclassics. But since it's been 7 years ago, they have nothing availible anymore.