What is the most likely cause of an oil leak from the front of my engine.

I am in the process of working with a mechanic. Should I get a specialist? Thanks, Bill P.

Wow! A crankshaft seal leak on this car is expensive to fix, right? I was hoping it might have been the VANOS solenoid valve or the VANOS Control unit. They seemed to be a little easier to get at according to the repair manual. I will let you know what I find out. In the mean time I have been driving the car. It seems to drive and handle great. Thanks for the advice! Bill P.