Aston Martin DB 9 2010 Manual page 75

Demand Wipe - Pull the stalk forwards.
The windshield wipers will return to their park position if the
ignition is set to OFF or the hood is unlatched, regardless of the right
stalk position.
Speed Sensitive Wipe - If the wipers are at fast wipe, when the
vehicle slows down (below 7 mph (11 km/h)) the wipers will go to
normal wipe speed.
If the wipers are at normal speed when the vehicle slows down
(below 7 mph (11 km/h)) the wipers will go to intermittent wipe
(position 2).
As soon as the vehicle speeds up (above 9.5 mph
(15 km/h)) the wipers will return to their original setting.
Windshield Wiper Delay Control -
Intermittent wipe time delay increases or
decreases in six steps (B). Sixth position gives
the shortest delay between wipes.
Windshield Washer Control - Press the
button (C) for more than one second to
operate the windshield washers.
Operation continues until the button is
released. When released the washers stop
immediately but the wipers continue for a few strokes, ending with a
pause and then a final wipe.
If used during normal wiper operation, the wipers operate
continually irrespective of the washer operation.
Headlamp Washers - Headlamp washers will operate automatically,
once per journey (each ignition ON), if the windshield washers are
operated and the headlamps are ON.
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