I have just found out that my intermittant wipers are not working and I found that the knob on the right hand side of the steering wheel that sets the delay of the wipers is not connected to anything.
Yep, mine works - a few seconds difference and fast intermittent isn't fast enough. Turn forwards for faster (shorter) and back towards you for slower (longer).
The steering column shroud is easy enough to remove - have you non-working intermittent features owners had a closer look?