I've started to notice a metallic sounding grinding noise on startup. Anyone else have this? It happens about 1 or 2 seconds after the engine cranks and only lasts for about a second. I have an older car that I drive to work and such so most of the time I only drive my 300C on weekends. I've noticed that the longer I wait between driving the car the louder (and more disturbing) the noise gets. However, a wait of only a few hours between stopping and restarting the car gets an almost unaudible noise. I took it to be looked at. Since I drove the car over there, the noise wasn't noticed by the dealer though. I may have to leave the car with the dealership for a few days for them to notice it. However, any ideas from fellow owners will be appreciated. Thanks.