Superb Tdi lots of electrical problems

Hi,

My Superb Tdi spent a while off the road and now I have a number of electrical problems, I'm hoping they are all or mostly connected!

1. Sometimes the engine doesn't start, have to lock and unlock the car, then it's usually OK but sometimes it stops again.

2. Cruise Control, keeps dropping out, sometimes it doesn't work at all

3. Instrument clusted, sometimes all the gauges drop to zero, it resets the trip mileage then come back all on its own

4. O/S/R doow sometimes doesn't lock/unlock from central locking

I have had issues with the CCU under the passenge seat, usual flooding, dried it all out and replaced all the plugs. Does anyone know whether all the issues above would be related to this?

Has to be the scrufffiest Superb ever, nearside accident damaged, odd coloured wing, keyed all down driver's side, paintstripper on the bonnet, 46MPG I love it!