u/DoughnutRelevant6544

I have had 4 of the same car a 2010 that would rattle when the engine started sometimes, it was at 270km. 2 2012's that were written off in accidents from rear ends in traffic - 2010/2013 both close to 180km no issues, rattles or problems. I bought a 2014 S last November, the engine is not shaking yet but on some startups It sounds very similar to the shaking that the bad 2010 had. Its only at 140km. Im looking to stop the issue before it gets to the bad state so I can get the car to around 300km. Any ideas? Last owner was a grandma and I know the car sat sometimes.