Well my vagcom and cable arrived this morning so I have been playing with it for quite a while this evening!
Managed to change quite a few things and I am over the moon. Especially for £15 quid.
Windows close upon rain sensor detecting rain. ( Even if ignition is off) VERY VERY COOL feature
XDS strong
Brake Assist strong
Rear wiper inactive
Needle sweep
Large MPH display on MFD
Bong for unlocking car
Bong when locking car
Mirrors fold down when reversing
CORNERING FOGS OFF! ( Most important of all )
Rear wiper wash fluid inactive
Tyre pressure monitoring turned on ( This was turned off for some reason even though I have the feature + button!! Strange )
Reversing fogs off
Activated Flashing brake lights in event of harsh/emergency braking
I also noticed that I can turn on/off a rear view parking camera. This suggests rns315 can support a camera so I am looking into installing one that will display on the sat nav screen.
Very happy.