V50 Electrics : Lots of faults and strange behaviour

[FreakensNL]

Fellow Volvo enthusiast,
I’m in need of some serious expert help....

2 weeks ago my V50 broke down while driving, "engine service required" appeared. Engine stalled. (of course girlfriend and dog where in the car :S)
Engine would not start but did turn over. Got the following messages;
-"brake system failure"
-"immobilizer see manual"
-"anti-skid service req."

Tried refitting all CEM connectors… No luck (tried starting for 2 hours before battery went) wipers went one 2 times as though I touched the wiper switch..
Window 1-touch function stopped working on the right window (just went 2 inches for each push)
Other windows all still worked

I did have a universal OBD-reader and gotten massages such as;
-Communication lost with dash cluster
-Can bus communication error...
-Fuel volume regulation... low, or something like that
I did a reset and they did not came back

Later that night i came back to tow the car thinking my CEM was fried... and it started (?! fixed itself)
No issues what so ever?? :S

A week later car would not turn over.. Ignition switch to 3, headlights went off as they should when you start, but no starter action
"anti-skid" massage came on and stayed on (1 hour of trying to get the starter to turn but again nothing)
Went to get my dad to tow the car home,, towed the car up to speed and started instantly
So no crank with key but it did run perfectly when clutch started..

Another week later (today)
Turned key in the morning first attempt, nothing (no crank).. Second attempt instant start..

Driving 70mph "engine service required" came up.. Boost was there but lag (above 2.500rpm)
On my way home couple hours later, no boost at all
Message disappeared, but still no boost

What can this be?!?!
Could a faulty ignition switch cause the whole car to go bananas?
I removed the CEM and tried to clean it, but could not get it open
(did give it all a good spray with "electric spray")

I have red allot on the CEM; but then normally a refitting would do the trick

And the ignition switch, but the thing is here; first no start and crank, 2 weeks later; start but no crank with key

(sorry for my grammar, I'm a dutch dislect :P)