Retrofitting Adaptive Cruise Control (ACC) in an Audi A5 can significantly enhance your driving experience. This guide outlines the process, focusing on using VCDS (Vag-Com Diagnostic System) to enable and calibrate the system in a 2010 Audi A5. This retrofit requires installing the radar sensor, steering wheel stalk with ACC buttons, and a compatible instrument cluster.
Understanding the ACC Retrofit Process
After physically installing the necessary hardware, the real challenge begins: using VCDS to integrate the new components with the car’s existing systems. This involves enabling ACC in various modules, coding the radar module (typically module 13), and performing a calibration procedure. Component Protection often becomes an issue, requiring removal before proceeding with coding and calibration.
VCDS and ACC Calibration: Version Compatibility
While the latest versions of VCDS offer a seemingly straightforward calibration procedure for the radar (module 13), many users report that it’s ineffective for older models like the 2010 A5. Online forums suggest that older VCDS versions, specifically 908.1, might be required for successful calibration. This older version is believed to utilize a different communication protocol that’s compatible with the ACC module in these vehicles. Locating and utilizing this older version can be a crucial step in the retrofit process.
Coding the ACC Radar Module (Module 13)
Coding the radar module correctly is essential for proper ACC functionality. The coding string varies depending on the specific vehicle configuration, including transmission type (manual or automatic), engine type, and the presence of a trailer hitch. Finding the correct coding string for a manual transmission 2010 S5 without a trailer hitch is crucial. While coding examples for other Audi models with ACC exist, they may not be directly applicable. Using incorrect coding could lead to malfunctions or errors.
Adaptations and Hidden Menu Activation
Beyond coding, several adaptations need to be made within various modules to enable ACC. This includes activating ACC in the MMI (Multi Media Interface), instrument cluster, engine control module, and the CAN gateway installation list. Additionally, accessing and adjusting hidden menus within the MMI can be necessary to fully enable and customize ACC features. Common adaptations include setting channel 7 in module 13 to “1” and enabling relevant checkboxes within the CAN gateway and other modules.
Troubleshooting Common Issues
After completing the installation and coding, error codes related to the radar sensor misalignment (e.g., error code 00234 in module 13) are common. This indicates the need for calibration. Other error codes might point to communication issues between modules or incorrect coding. Addressing these errors requires careful analysis of VCDS scan results and systematic troubleshooting. Additionally, ensuring all necessary adaptations are correctly performed is vital for resolving these issues.
Conclusion
Retrofitting ACC in a 2010 Audi A5 is a complex process requiring technical expertise and a thorough understanding of VCDS. The specific challenges related to VCDS version compatibility, radar module coding, and adaptations need careful attention. While online resources can offer valuable guidance, professional assistance might be necessary for a successful retrofit. Successfully completing this process will reward you with the enhanced safety and comfort of Adaptive Cruise Control in your Audi A5.
