Steering Wheel Vibration

I have a co-worker that has a BMW 330 (2004)and is complaining about a vibration in the steering wheel when driving. He is a one finger driver so to speak. Also has a small vibration in the car when at idle. Can you shed some light on the subject. Now be nice with the one finger bit..... and MANY thanks!

:banghead: :p

well if there is a shake while driving it can be from the alignment of the vehicle he can have that checked out but for the shake at idle i am not sure