my daughter just bought a used 2005 merc mariner with awd and has 67K miles.the car is excellent cond and it has brand new michelin latitude touring tires and when i drove it,its noisy as hell on the left front and i think its tires beacause the noise changes on different pavement.these are supposed to be quiet tires.on the other hand can it be front wheel bearings?anybody have a guess?