Thanks for your message! Generally, if you go to Settings > About Device, there will be an option to update in that section.
But just so you know, I support US products and customers. So if you want the most accurate information, here's the Samsung Germany portal for support on that product: http://www.samsung.com/de/support/model/GT-P5100TSADBT
Hope this helps you!
I purchased GT-P5100 (wi-fi only) in Germany last year and now I am in India.
I wanted to update the firmware of my tab.
Kindly let me know how can I do that. I have been trying the same for the past couple of months unsuccessfully.
Thanks in advance