If its dry get a few laps under your belt , then M track button , after all this is where it was developed so it is its spiritual home
Make a note of the number to call if you have an off, just in case ...
And enjoy there is nothing else like it, it is a buzz especially the feeling once you have completed a lap, get it every year on my first one round..
and stay here
http://www.am-tiergarten.de/
Its is the best of the hotels IMOP, and this is where the famous restaurant is
http://www.am-tiergarten.de/de/restaurant/
When you going in July ?