my xsara's rear wiper is awesome... at least i like it... when it's on, it's intermitent, when it's on it's on... the water squirts out if you turn the knob past on (it springs back to the on position)
lol sorry... i truly have no idea... i don't know how different the 4wd drivetrain is, and what it requires.... also, i don't know which ECU would have to be used and if it's possible.