I bought my 350 back in July, upgrade from the 300. I have almost 3000 miles on it, about 1200 miles ago by chance I turned the radio off when I left the house and I heard this funny noise coming from the engine. I thought maybe it was just because it was early morning and the car needed to warm up. Well, the noise never left, it does it all the time. I took it in to the dealership and they said its normal. Does anybody else experience this sound(sounds like a diesel) with thier 350?