Dear sir,  Sorry to write in english (you can answer in German), but i am temporary in Germany for studies. My problem is the following: I rented few blocks away from my house in Dortmund an underground garage (closed)during one year for my car and motorbike. I moved away from Dortmund in october. I have two problems: 1)I cancelled the garage for the  1st of october, but had one week delay. I frogot and the Hausmeister changed the locks the 05th of october (without  prior notice) and asked me to come to empty the garage. This is all ok, but when emptying the garage, i noticed that the motorbike (i usually left the keys on the contact) had been driven for 60km. The Hausmeister deny any use. What can i do? 2) They continue to charge directly my bank account for the rent of the garage, for october and november. I called them this morning and they told me that i still have the keys. But i gave back the keys to the Hausmeister in the hands the day i moved out. I just kept one entrance key he told me to put in the mailbox, and i&#180;ve done that the 7.10.2005. Do they have the right to automatically charge my bank account even after the moving out, and what can i do to be payed back for october and November? Shouldn&#180;t they contact me in case of any problem (they have my adress) before acting such way?  Thank you very much.

§ 537 Entrichtung der Miete bei persönlicher Verhinderung des Mieters. (1) Der Mieter wird von der Entrichtung der Miete nicht dadurch befreit, dass er durch einen in seiner Person liegenden Grund an der Ausübung seines Gebrauchsrechts gehindert wird. Der Vermieter muss sich jedoch den Wert der ersparten Aufwendungen sowie derjenigen Vorteile anrechnen lassen, die er aus einer anderweitigen Verwertung des Gebrauchs erlangt.(2) Solange der Vermieter infolge der Überlassung des Gebrauchs an einen Dritten außerstande ist, dem Mieter den Gebrauch zu gewähren, ist der Mieter zur Entrichtung der Miete nicht verpflichtet.