What is the reason for the ambient lights in the Q5L not working?

[OEzra]

There is a circuit malfunction causing poor contact. Below is relevant information about the Audi Q5L: 1. Exterior: The new Audi Q5L measures 4765×1893×1659mm in length, width, and height, with a wheelbase of 2908mm. The front features sharp angles and a hexagonal grille, similar to the family Q7, with an overall style transitioning from the rounded look of the older Q5 to a more aggressive one. After being lengthened, the body length and wheelbase have improved compared to the older Q5. 2. Powertrain: It adopts a newly upgraded powertrain combination, featuring the third-generation EA888 engine (available in two versions: 2.0T high and low power, with the high-power version delivering a maximum power of 185kW and peak torque of 370Nm), a newly developed 7-speed Stronic 'sports car-level' transmission, and the quattro-ultra intelligent all-wheel-drive system.

[DelKatherine]

Recently, the ambient lights in my Audi Q5L suddenly stopped working, and it took me quite a while to figure it out. The most likely cause is a blown fuse—check the small box on the left side of the driver's seat for the fuse labeled 'ambient light.' Another possibility is that the light strip itself is damaged, especially at the door panel connections where squeezing can lead to poor contact in the wiring. I’ve also noticed many friends encountering issues after modifying the infotainment system, where harnesses get pinched or connectors become loose during disassembly. When troubleshooting, start with the simplest steps: first, check if the ambient light option is turned off in the vehicle settings on the infotainment screen, then test different color modes. Once, I removed the door panel myself for inspection and found that water seepage had caused oxidation at the connector. Such electronic components aren’t recommended for DIY disassembly—it’s best to visit a dealership to read the fault codes with their diagnostic tool. They can determine whether it’s a door control module issue or a lost signal on the bus line.

[AngelaRose]

Last week I found the ambient lights in my Audi Q5L wouldn't turn on no matter what. Don't rush to disassemble the car just yet. First check the lighting settings in the scroll wheel menu on the left side of the steering wheel - sometimes accidental operation can turn off all ambient lights. If the settings are correct, there's an 80% chance it's a hardware failure. The most vulnerable component is the ambient light strip under the door sill panels, which can easily get water intrusion and short circuits when hit by high-pressure car wash jets. Aftermarket third-party light strips are even worse - I've seen cases where loose connectors caused complete failure of all cabin lighting. Another hidden culprit could be a weak battery - when voltage drops below 12V, the system automatically shuts down non-essential electrical equipment like ambient lights. For diagnosis, try testing all door illumination lights first - if other lights work normally, you can basically rule out fuse or central control module issues.