The ACC heating function (steering wheel heating) in the W465 G-Class or similar vehicles is typically independent of vehicle speed. However, it may adjust based on external conditions such as temperature or driver preferences rather than directly responding to how fast the vehicle is moving. Here's a breakdown of how the system operates and how it might indirectly relate to speed in some cases:

1. Basic Functionality of ACC Heating:

• The ACC heating function is designed to warm the steering wheel for the driver’s comfort, especially during cold weather conditions. The system is typically activated either automatically (when external temperatures are low) or manually through the vehicle’s climate control settings or steering wheel buttons.
• The heating intensity is usually controlled through predefined settings, which either automatically adjust to external temperature or are set by the driver.

2. Does the Heating Change Based on Speed?

• Generally, the steering wheel heating does not directly adjust based on vehicle speed. It is primarily influenced by:
  • External temperature: The system might adjust the level of heating based on how cold it is outside, but it is not speed-dependent.
  • Driver control: In some systems, the driver can manually adjust the heating intensity, and it remains consistent until the driver changes it or the vehicle adjusts for environmental conditions.
  • Automatic adjustments: Some vehicles might have settings where the heating intensity increases or decreases based on ambient temperature. For example, the heating might activate when the outside temperature drops below a certain threshold, but this is still temperature-based, not speed-based.

3. Indirect Relationship with Speed:

• High speeds: While the heating function does not directly adjust based on vehicle speed, at higher speeds, there could be indirect factors at play. For example:
  • In colder weather, driving at higher speeds could result in the driver feeling colder, and the vehicle might adjust the heating intensity to compensate for this increased wind chill effect. However, this adjustment would still be based on temperature and environmental conditions, not speed itself.
• Low speeds or idling: Similarly, at slower speeds or when the vehicle is idling, the heating intensity might not need to be adjusted further because the external airflow is less intense, and the system can maintain a consistent level of comfort for the driver.

4. Potential Future Features:

• Speed-Dependent Adjustments: While not currently a feature, future iterations of steering wheel heating systems might include speed-dependent functionality. For instance, at higher speeds, the system could automatically increase heating to compensate for the loss of warmth caused by wind chill or airflow. However, this would be an added feature that is not typical in most vehicles at present.

Conclusion:

The ACC heating function does not directly adjust based on vehicle speed. Instead, it primarily responds to ambient temperature and driver preferences, ensuring comfort during cold weather. While higher driving speeds could indirectly influence comfort (due to wind chill), the system itself typically maintains a constant heating level based on external temperature or manual adjustments, rather than vehicle speed. Future developments might integrate more dynamic adjustments, but these features are not common in the current system.