Integrity of Chicago, LLC disappointing and alwaful Chicago Illinois

I Don't Even Know Where To Start With This One... I went to buy a Mercedes R 350 from this people, which was suppose to be my car number 8 in my life. In all of my previous dealerships I was more than satisfied, but not with this one. In a first place, the price that they asked for the vehicle was simply ridiculous ... The test drive was kind of weird and through the all time the sales person Brad Pitt was trying to play the radio (so I can't hear the problems with the car). I ended buying because the model and the millage was the exact one that I was looking for. After I sign the documents they gave me a one month warranty and asked me to bring the car back so they can fixed the 5 issues that we found. Two days later (May 18th 2015) I brought the car back and they promised to fix it for 2-3 days. Three days after I left the car I asked if they are done with it and they told me that the car is on a working progress and they can't give me exact day when it will be ready. Twenty days after that I went to get my car with my lawyer. The car was never fixed and I would strongly advice everyone to avoid that dealership!