I brought the car to the dealer, they said 4 different mechs. road tested it....they said problem did not happen! They then sent me out with a mech. & had me drive. The problem did not happen! I tried to tell them the road conditions were not even close to I normally drive in. I drive about about 300 miles per day. All over L.I. The car is going back in 08/31/15 for 2 days. If they still can't find it....I just don't know! They will not take the car apart to find the answer!