I'm finding it a bit odd getting the wipers to service position, and back to normal afterwards. As per Mk. 2, after turning off ignition, I press the wiper control arm down. Nothing happens. I turn the ignition on again, then off, and eventually the wipers go up into service position. Same for getting them back to normal. Turn on ignition, press wiper control down. Nothing happens. Do it again and eventually it plays ball.   Am I doing something wrong here? Is it a different procedure on Mk.