electricl problems
 

I have a Saab 9-3 2.2tid on a 53 plate
Recently I have some faults appearing which I think may be electriacal.
1. SID started giving false info about DTe and MPG
2. Drivers door window suddenly stopped working and is stuck in the closed position
3. Rear door locks work intermitently with remote control and driver door contrl
4. Now the cabin fan refuses to turn off when warn even with the keys out of the ignition
Has anyone come across this before or have any suggestion what it could be
Thanks