Some questions on a 560 SEL...

Does anyone have the wiring diagram for this car? I need to track down an issue with the power seats and telescoping steering wheel not working. It appears to not be a fuse or relay.

Question on Oil pressure: When i start up the car it idles right at 3 where it is suppose to and while driving down the road it idles at 3. When the car is warmed up the car's oil pressure while idling is around 1 -- Is this normal? The car is idling a little rough from not being driven for awhile, and may be causing the low oil pressure?