I cannot figure out what is rattling when I start my car. It happens during a cold start, only in drive or reverse, and only at a complete stop. May be linked to the gas pedal, but it sounds like it comes from the drivers side engine bay, and immediately after hitting the gas it goes away. Doesnt affect the drive at all, just drives me insane! Took it to the dealer today, and just my luck, it wouldnt do it. Scheduled another apt tomorrow.

 

Looks like it is the motor mounts

 

That makes sense now that you mention the motor mounts. Hopefully it's covered by the warranty.