Who can recommend good MB dealers around Berlin/ Potsdam

Hello everyone, I have already asked the question in my thread SLK 200 vs GTI, but there it finds so explicitly no one. Don’t feel taken seriously by my dealer in Potsdam and mistreated me. As long as they believe one would have a 6 digit account the world is in order. If they then find that it is not so and they have to give themselves some trouble in financing and buying it, everything is over. There you get called a purchase price for his car, which is beyond vo n is good and bad and then you will be left on the left. I was allowed to try it out, but a concrete offer didn’t come any more when I said that I was interested in the 230. I’m on the road now in the further vicinity and try something in Dresden. Who can recommend me a dealer, who also makes some effort. In the vicinity there are certainly MB representatives in the larger cities (Halle, Leipzig, Berlin, Magdeburg). Where should I turn to be taken seriously? Greetings e rudi