Translation of sergeant in German

A little latter we came back to our home and Leonard offered me to take me around the city with his motorbike. I could not refuse although I am a little scared by these vehicles, as they are dangerous.
One could see in every touristic site and traveler's office advertisement for language schools and private teachers. The teachers usually gave the CV with an nice picture of themselves. It looked funny.
I had to get used to riding the bike and I almost fell a few times. I drove on the main road and stopped at several little villages near the beach. The locals were very friendly and welcoming.