In most vehicles, including those with Adaptive Cruise Control (ACC), the heating function of the steering wheel does not automatically activate when ACC is engaged. Typically, the steering wheel heating is a separate function that requires manual activation, either through a button on the steering wheel or through the vehicle's settings menu, and it operates independently from the ACC system.

Key Points:

• Independent Function: The Adaptive Cruise Control (ACC) system is primarily focused on controlling speed and maintaining distance from vehicles ahead, while the steering wheel heating is meant for driver comfort, especially in cold weather.
• Manual Activation: In most cases, the heating function must be turned on by the driver, either through a dedicated button on the steering wheel, on the dashboard, or within the vehicle’s infotainment system. The ACC system does not control or activate the heating function automatically.

However, some high-end models or specific vehicle configurations (like those in the AMG lineup) may feature integrated climate control systems that can automatically activate the steering wheel heating based on external temperatures or when the vehicle is in certain driving conditions. In these cases, the heating may activate based on a set threshold, but it would still not be tied directly to the ACC being engaged.

Conclusion:

Generally, steering wheel heating in vehicles with Adaptive Cruise Control must be manually activated and is not automatically triggered by engaging ACC. To activate the heating function, you would typically use a separate control specific to that feature. If you are driving in cold weather, you may want to manually activate the heating for your comfort, regardless of whether the ACC is engaged.