I'll look when I get home if the E code is on the headlight.
I know some of the answers as I picked up my car in Germany doing euro delivery.
The rear blinkers are red and not amber like the German spec vehicles. I believe you will have to change the outer taillights to achieve this. There is an interior green filter between the bulb and red lens which achieves the amber effect. An amber bulb will not blink amber behind a red lens. Not sure about fog.
The radio and navigation will both work in Germany and USA but you will need to get the German/Euro maps from a dealer in Germany as the maps sold in the USA are NA maps.
I would assume the language can be programmed or coded into German from English. You can make the units into metric via idrive.