^^ I agree with the above!! Sorry that she got all dirty. Hope you can get her clean and make her look like new.The majority of Coach scarves are 100% silk so I would definately not wash them in a washing machine!
Even using the 'delicate' setting they would get mangled in the spin cycle!
If I were you I would hand wash it in the sink using Woolite and cold water.
Let it soak for a while since it is that filthy.
Gently rub on it/lather it to get the dirt out.
Rinse well in cold water.
Hang it in your shower to drip dry.
Once it is clean and dry, iron it on a low heat (silk setting) if needed if it is wrinkled.