[Les 57]

Hi,
I think you need the enhanced package to change the colour. I have and even mine only stay on if the ambient light sensor allows (it's dark enough) or if I switch on my headlights.

It will be dark when I go home later so I'll have a play around and let you know what I get in differing light conditions.

 

[Les 57]

Hi, Just checked mine in day light (nice and sunny outside) with exterior lights switched to AUTO. Start engine and have no door strip lights at all. Turned the exterior light switch to headlights on, start the engine and all door strip lights come on and stay on. When I start my car up in the garage it is dark enough for the ambient light sensor to make the door lights come on but they do go off after a while if it's bright enough. I have a link to the owners manual. I'll try and send it to you. It may clear it up in there.

2018 Audi A5 – Owner's Manual – 409 Pages – PDF

ownersmanuals2.com

 

[Les 57]

Does this help from the owners manual.
Interior lighting Applies to: vehicles with interior lighting .,. Select in the Infotainment system : MENU button > Vehicle > left control button > Vehicle settings > Interior lighting. The interior lighting turns on when you switch the headlights on while the ignition is on . Version 1 To adjust the brightness of individual zones, select Front brightness, Door brightness or Footwell brightness . Turn the control knob to the left or to the right. Press the control knob to confirm the brightness. Version 2 Select and confirm one of the displayed profiles by pressing the control knob. Individual : you can customize the brightness and color of individual zones . Press the right control button. Press the control knob again to confirm the settings . Audi drive select: the interior and contour lighting color changes depending on the driving mode selected in drive select* c::> page 138 .

 

[Les 57]

Sorry my friend I am now well and truly baffled. I tried all sorts of options on Friday but could not replicate your issue. Perhaps there is fault with the ambient lighting sensor. You've obviously checked for blown fuses etc.

 

[Les 57]

That's correct. In the dark / low light conditions the strip shows white when I open the door to get in. When I start the car it turns to which ever colour I have selected.