This is the main door of the building. There is a sign with the number 5 on the right side.
The lockbox for the keys is located on the right side of the building's main entrance. It’s a padlock hanging from a pipe
Here is the lockbox (padlock)
Take the keys by pulling down the black lid and enter the code: 0214
When you enter the code 0214, pull down the small black button on the left and take the keys.
Shuffle the numbers and lift the black lid again.
Enter the building and continue straight ahead. The apartment is located on the ground floor, so there is no need to climb stairs or use the elevator.
Your door is the one on the left as you exit the elevator. It's dark brown.
This is the door of the apartment.
Enjoy!