How do I adjust the fridge door hinge?

Appliance: Fridge/Freezer
Make; Bauknecht
Model; GKI9051-0
Serial No: 855211315000

The fridge door on the opening side has dropped so that the wooden cover catches the wooden cover of the freezer door below when it is opened and closed. It would appear that the door hinges need to be adjusted to raise the outer edge of the door. However I cannot find out how to do this as there are no adjustment screws that I can find. So how is this done?