My car makes some noise when i put my foot down when moving from a standstill. It doesn't happen all the time but frequent enough to be annoyed. I spoked to my dealer after drove the car for 6 months and took in for a quick check-up. They reckon it's from the nature of Turbo engine. I'm not convinced. How do I convince them that something isn't right? 1st service is coming up soon and I am now thinking whether I should go to Audvolks or other places. Would it cost a lot more?