Norm, my 1996 S500 has adjustable cam timing solenoids... I suspect they are very similar to the system on your motor.
The solenoid is nothing more than an electromagnet coil... you can simply unplug the wire to it and test the coil for continuity at the connection point.
On my S500, there are only three allen bolts that hold each solenoid to the front of the timing chain cover (up on the heads).
Internally, the solenoid is not connected to anything... remove the three bolts and it comes right off.
Hope this helps, KenP