Many Volkswagen Passat NMS owners are interested in enabling the “automatic drive away after short stop” and “automatic drive away by pre-trigger” features, often referred to as Stop-and-Go. While simply checking boxes in the long coding section of controller 13 within VCDS might seem like the solution, it often doesn’t work. This article will explore the complexities of enabling this feature using VCDS for the Passat NMS.
The challenge stems from the Passat NMS utilizing a PQ platform with a BOSCH MRREVO ACC system. Unlike the MQB platform, where “ACC Stop & Go” is a selectable swap code within the radar module, the PQ version lacks this straightforward option. However, documentation for the 2019 VW Sharan, which shares a similar ACC system, indicates a basic Stop-and-Go functionality:
“Stop-and-go traffic ACC can brake vehicles with DSG® dual clutch gearbox to a standstill and hold them stationary. ACC remains active. As soon as you accelerate to at least 2 km/h, ACC control is resumed.”
This suggests that a limited form of Stop-and-Go is achievable on PQ platform vehicles equipped with the 7N0 radar. Enabling it on models beyond the Sharan requires further investigation.
Preliminary research suggests several prerequisites for activating this feature:
- Electronic Parking Brake (EPB) and Autohold: These are essential for maintaining a stationary position. This combination might be possible with the Mk60EC ABS module and a compatible EPB controller, particularly for PQ-based Golf models.
- ABS Module: The ABS system plays a crucial role, as evidenced by the Sharan’s integrated EPB within its ABS module. The specific ABS module version might be a determining factor for compatibility.
- ACC Dataset: The specific dataset programmed into the ACC module could influence the availability and functionality of Stop-and-Go.
Efforts are underway to unlock this functionality on various PQ platform vehicles, including the Passat NMS, T5 (with retrofitted T6 ACC), and T6. Collaboration and knowledge sharing are key to understanding the intricate coding and parameter adjustments necessary within VCDS to achieve true Stop-and-Go functionality on these vehicles. Further research and experimentation are needed to determine the precise combination of hardware and software modifications required. We encourage anyone with relevant experience or insights to contribute to this ongoing exploration.
