Combination switch S-320
 

Can someone please guide me to replace the main light switch I have on 1996 S-320. It is acting up. I think I may have short in it. Sometimes the side lights (front and back) comes on after I park the car overnight. I also noticed, when you you turn the headlight switch on, it does not stop on either position one for low light or the main headlight position.
I am having difficulty getting the switch out. Can someone help.

Thanks
Michael