Not the most stunning stadium from the outside, with nobody around. This is the north entrance - the first one you reach walking in from the S-Bahn station and most car parks.
The north-west entrance - 'North Curve' to the left, main stand right.
The south-east entrance through the trees - back of the other grandstand right, 'South Curve' left.
... and another strikingly similar corner! Has to be the south-west!