The rattle from the front of the car could be the rubber wheel arch liners vibrating, it's a common problem, it usually sounds like a rattle behind the dash or glove box and occurs at certain speeds. The front left side is the usual offender. There should be about 3 or so stickers around the outside of the rubber wheel arch. Put your fingers around the rubber wheel arches and if you find there is play then stick a couple or so 1" round heavy duty felt pads around the rubber, that will stop the rattle (if that's the problem of course).