What should trigger the lights in the door edge (red on rear edge, white on underside)?

I would expect them to come on whenever the door is open, but nothing happens. Do they only work with certain Packages? I have all except Technology and Cold Weather on my '06 A3.

__________________
2006 A3 2.0T/DSG, Garnet red pearl/beige, Sport + Open Sky
Koni FSDs, Neuspeed RSB, ST Flights/Toyo T1Rs, many VAG-COM mods, Eurojet PCV

I didn't think this feature existed on the US models. I have tech and cold weather packages, and if there is a way to activate it I haven't found it yet.

__________________
2007 A3 3.2 Quattro :: silver/black :: tech :: cold weather :: Sirius :: Open Sky :: blindspot mirrors :: Formula One tint and bra :: Revo

Next up: Milltek exhaust

im like 99% sure mines come on in certain situations. however i dont know exactly how it comes on either, ill check it out later.

A4 has lights. We have reflectors.

__________________
'01 BMW E46 Orient Blue/Tan Special Order
'07 Audi A3 Silver/ Grey 2.0T/DSG/Open Sky/S-Line/Cold Weather/Tech pkg

That doesn't explain the white lens on the bottom of the door, nor the specific picture of them in the '08 A3 sales brochure.

__________________
2006 A3 2.0T/DSG, Garnet red pearl/beige, Sport + Open Sky
Koni FSDs, Neuspeed RSB, ST Flights/Toyo T1Rs, many VAG-COM mods, Eurojet PCV