In the east maybe. In the west there are plenty of flash cars in districts like Savignyplatz and in the outskirts of the city.
The outskirts are really suburban more than anything, and completely different.
but the disparate nautre of east/west berlin is one of the best things going for it. especially in the crossover areas like kreuzberg (not kreuzkoelln) and bits of mitte (that haven't been gentrified yet)