No dude...you are correct in that it is pretty easy to install with simple tools...and yes, I'm not surprised at all that a dealership would have the nads to charge 2 hrs for something that takes 15-20 minutes to install...are you?
As I said...my EPC is for 1992 W124s...though I can't imagine that part being different between our years. Regardless, at least you see how it goes. Happy wrenching !!