The car is too big. It's a high-end sedan which is almost 2m wide, 5m long and has a wheelbase of 2.8m. You'll barely fit in normal-sized lanes and there are a lot of streets you'll get caught in due to bends and parking. Speaking of parking, you'll find few places to put that beast.
The car has a 70l tank; that'll cost you around $120 to fill up. The fuel economy is shit at almost 11l/100km (although it's better than a BMW
With a 3l engine at 268 horsepower it'll cost a fortune to insure. It's a luxury car; Vollkasko (complete) insurance will be even higher. Plus car tax. And parking
The car isn't built for the EU, only the US and Australia. That means they didn't have to design in all the EU requirements. You could be looking at having a lot of parts replaced, including electrics, glass, catalytic converter, filters, and anything else the schlub at the TÜV decides he wants you to get in order to punish you for being so stupid and arrogant as to bring that thing here.
You're better off putting your car in storage in the US and picking up something here. In many places you can avoid cars and all their related costs and use the excellent public transportation. On the occasions you need a car you can pick up rentals cheap from the no-name local firms. Nice cars, I might add.
Just saw cinzia's post and want to add: you'll need to get a German driver's license if you're here longer than 6 months. If at all possible, trade yours in NOW for a VA license. Virgina's is fully reciprocal and requires you to take no tests.