The thumbwheel is used to set rain sensor sensitivity and wiper swipe frequency.
Single sweep
Lower the stalk switch and release to make one sweep.
Windscreen wipers off
Move the stalk switch to position 0 to switch off the windscreen wipers.
Intermittent wiping
Move the lever up to switch the wipers to intermittent wiping. Set the number of sweeps per time unit with the thumbwheel when intermittent wiping is selected.
Continuous wiping
Raise the stalk switch for the wipers to sweep at normal speed.
Raise the stalk switch further for the wipers to sweep at high speed.
Important
Before activating the wipers - ensure that the wiper blades are not frozen in, and that any snow or ice on the windscreen and rear window is scraped away.