Sheehy INFINITI of Chantilly

I purchased infiniti q50s around 7 months ago. Since that time I went to service 17 times. It was a big mistake I bought a infiniti!!! They sold me this car with clean Carfax and Infiniti Certified. Infiniti certified means nothing because I got too many problems with engine,transmission,electric and mechanic system in 7 months. Last time I stopped by NTB for wheel alignments they told me that my car got accident(unreported) before, and they proof it because rear right side of wheel cant alligned very well. Dont believe clean carfax...... I went to this dealer because I couldnt trust craiglist sellers or Junk dealers they have also clean carfax!!. The car is under warranty but I went to too many times which means I spend too much my time to figure out this. Today I visited them for another mechanical problem and talked with service manager. I asked him that Can you check my service history how many times did I come here? He checked that and He told me that " We are sorry but all BMW and Mercedes are same....Here is the answer please ask to yourself that where is the quality? before you come in...