Installing a Crankshaft sensor on a w220 '00 S500
 

I've had a problem with my 2000 S500 for a while where it would randomly stall when idle. I had a similar problem where the car would violently shake at idle and found out it was the MAF sensor that I changed but now it stalls sometimes out of no where at stoplights and such. I took it to my friend at a dealership of a comparable company and nothing showed up on the scan. He narrowed it down to the crankshaft sensor (which is what I've been told could be it) and the fuel pump. I just bought the sensor for $70 and now need to install it. Could anyone offer instructions on how to do the job? I did a MAF sensor change which was easy so I hope this'll be the same. Thanks in advance !

The sensor is located on the "flange" of the bellhousing JUST behind the DRIVERS side valve cover.