Well, I have had the misfortune of 4 ambulance trips with my now 4 year old son, and not once for any of my calls to the emergency line did the person who answered the phone speak English. however, my german is not good at the best of times and even worse when in a mild panic, but we managed to bumble through (although I did give up when he was trying to tell me once how to do mouth to mouth.....).

Bascially if you are able to give an address, they will come!