Why does my steering wheel makes loud grinding noises when I start my car.

What is your question?

When I even slightly turn my steering wheel when I start my car, it makes a terrible loud grinding noise. After I let it idle for 25-30 min. it stops. The car was serviced 2 months ago and steering wheel fluid was added. Is it the cold weather? It's never happened before though.

What makes this problem better or worse?

Very bad when I start the car. Better after idling 25-30 min.

How long has your 2008 Mercedes-Benz GL450 had this problem?

About 6 weeks