This article addresses common questions about activating dynamic taillights on a 2014 Audi A8L (D4) using VCDS (Vag-Com Diagnostic System) version 18.9.0.2 from a 2018 scan. Specifically, it focuses on enabling taillight activation with single-side parking lights and activating the amber rear turn signals. This information pertains to a US model A8L, and may differ for other regions.
Understanding the A8 D4 Taillight System
The Audi A8 D4 features a sophisticated lighting system that includes dynamic taillights. However, certain functionalities, like single-side parking light activation of the rear lights and amber rear turn signals, might be deactivated by default in US models. VCDS allows users to modify these settings.
Accessing the A8 D4 Taillight Settings with VCDS
Using VCDS, you can access the various control modules responsible for the vehicle’s lighting. The relevant module for taillight configuration in the A8 D4 is typically module 9 (Central Electrics). However, based on the provided scan, module 9, sub-module 5 (4H0 907 472 B – A31 LED Mod1L H03) and sub-module 6 (4H0 907 472 B – A27 LED Mod1R H03), appear to control the left and right tail lights respectively. These modules control the LED functionality. It’s crucial to correctly identify the specific module and sub-module before making any changes.
Enabling Taillight Activation with Single-Side Parking Lights
The goal is to activate the taillights when the single-side “European” parking light is on. While the front parking lights function correctly with the turn signal stalk, the rear lights do not illuminate. Within the appropriate module (likely Module 9, sub-modules 5 and 6 as per the scan), specific coding adaptations are required. Unfortunately, without further information specific to the D4 platform, pinpointing the exact coding adaptation is difficult. Consulting the Ross-Tech VCDS website or forums dedicated to Audi coding may provide the necessary coding changes.
Activating Amber Rear Turn Signals
The A8 D4 taillight assembly includes amber sections intended for turn signals. However, these might be inactive in US models. Again, the necessary coding changes likely reside within Module 9, sub-modules 5 and 6. The coding process involves modifying specific bits within the module’s coding string to enable the amber turn signal function. Researching Audi A8 D4 coding forums and the Ross-Tech website is highly recommended to find the correct coding adaptations.
VCDS Scan Analysis and Troubleshooting
The provided VCDS scan reveals fault codes in modules 1 (Engine) and 8B (Adaptive Cruise 2), and a fault in module 53 (Parking Brake). While these faults are not directly related to the taillight coding, addressing them is important for overall vehicle health. The engine fault (Coolant Pump for Intercooler) could impact performance. The Adaptive Cruise Control fault (Sensor Incorrectly Positioned) might disable the system. The Parking Brake fault (Function Restricted due to Missing Message(s)) could limit functionality. Consult factory repair information for diagnostic and repair procedures.
Conclusion
Activating the desired taillight functionalities on an Audi A8 D4 requires careful research and precise execution of coding changes using VCDS. While the provided scan offers valuable insight into the vehicle’s modules, further research on specific coding adaptations for the D4 platform is essential. The Ross-Tech website and dedicated Audi coding forums are invaluable resources for this process. Always exercise caution when modifying vehicle coding and ensure a proper understanding of the procedures before implementation. Incorrect coding can lead to unintended consequences.
