No real problems.
Change 'residence to' to 'resident in' though.
Change 'know' to 'enquire about'.
The sentence starting "I would appreciate" doesn't scan very well. Something along these lines might be better:
"I would be grateful if you could provide me with an update on the progress of my appeal and, if possible, an indication of when I might receive notification of its outcome. (I am due to commence my on-site studies at the University of Siegen on [date])".