The Volkswagen Passat NMS, despite its advanced features, sometimes requires VCDS (Vag-Com Diagnostic System) tweaks to enable certain functionalities. A common request is activating the “automatic drive away after short stop” and “automatic drive away by pre-trigger” features. However, simply checking the corresponding boxes in controller 13’s long coding doesn’t always work. This article explores the complexities of enabling these features in a Passat NMS using VCDS.
Understanding the Challenge of Automatic Drive Away with VCDS
Initial attempts to enable automatic drive away features often prove unsuccessful. Modifying the long coding in controller 13, specifically for a 7N0 907 572 C controller with standard coding 01001002FE0739, might not yield the desired results. This is because the functionality often relies on more than simple coding adjustments.
Example of a VCDS coding screen.
The presence of Traffic Jam Assist, linked to the A5 camera’s parameters, is a crucial factor. These parameters are typically inaccessible through VCDS, posing a significant hurdle. However, certain PQ-based Passat models, utilizing the BOSCH MRREVO ACC system, offer a glimmer of hope.
Exploring Stop-and-Go Functionality in PQ Platform Passats
Documentation for the 2019 VW Sharan, which shares the same ACC system, mentions a “Stop-and-go traffic ACC” capable of braking DSG-equipped vehicles to a complete stop and holding them stationary. This feature, even in its “light” implementation with the 7N0 radar on the PQ platform, suggests the potential for similar functionality in other PQ-based vehicles like the Passat NMS.
Passat NMS equipped with Adaptive Cruise Control (ACC).
While MQB platform vehicles utilize a specific swap code within the radar for “ACC Stop & Go,” this code is unavailable for the PQ version. The challenge lies in discovering how to activate this functionality in PQ cars beyond the Sharan.
Key Factors for Enabling Automatic Drive Away in Passat NMS
Research indicates several prerequisites and crucial components for enabling these features:
- Electronic Parking Brake (EPB) and Autohold: These features are essential for maintaining a stationary position, potentially achievable through the Mk60EC ABS system coupled with a China EPB controller in PQ-based Golfs.
- ABS Module: The ABS system plays a critical role, especially considering the Sharan’s ABS module with integrated EPB.
- ACC Dataset: The specific dataset within the ACC module likely influences the availability and functionality of automatic drive away.
Example of ABS module and EPB components.
Efforts are underway to unlock this functionality in various PQ platform vehicles, including the T5 with retrofitted T6 ACC and the Passat NMS. Further investigation and collaboration within the VCDS community are crucial to achieving this goal.
Conclusion: The Quest for Automatic Drive Away in Passat NMS Continues
Enabling automatic drive away features in the Passat NMS using VCDS remains a complex endeavor. While direct coding modifications might not suffice, understanding the underlying dependencies, such as the A5 camera parameters, EPB/Autohold system, ABS module, and ACC dataset, is paramount. Continued research and shared knowledge within the community are essential for unlocking the full potential of the Passat NMS’s advanced driver-assistance systems.
