I bought this car in june last year. I have 1 yrs warranty on it. The car shakes when idle. My mechanic has had it in on numerous occassions to try and get to the route of the problem but still the problem exists . What I have started to realise is that when the weather is cold the car runs 90% ok I only sence the mildest flutter, but as the warmers weather comes in the car starts to shake when idle, the warmer it is outside the worse the car is. Strange! What can this be. My son thinks its a sticky cylinder. He has also said he thinks the compression might be poor he is not a mechanic though so I won't let him touch the car!?! I don't know what to do. The mechanic is fed up I think. He changed a thing called the Lambdh scencor but that hasn't improved things. Any sugestions would be greatly recieved.