hello i own a 2.5i premium and theres something that bugs me every day i drive it. Ever since a month or two after i bought it in February it makes this weird grinding noise coming from the engine bay, when the engines under load like going down a hill or small incline in 4th or 5th gear when im doing mostly highway speeds. its not a constant grinding but kinda jumpy...on and off...hard to explain. I've gone to the dealer complaining of this and they supposedly fixed it but didn't... any help would be appreciated
thanks