Using the AMG's hydraulic and pneumatic functions in DC mode without the truck engine running will not cause the battery to drain.

• A. Not enough information
• B. Depends on load
• C. False
• D. True

Answer: (D)

In DC mode with the engine off, hydraulic and pneumatic functions are designed to operate without pulling continuous power from the starting battery. The system uses stored energy—such as precharged hydraulic pressure from accumulators—or a dedicated, low-power electrical path for control electronics, so activating these functions does not steadily drain the main battery. This means, under normal use, turning on hydraulic or pneumatic operations while the engine isn’t running won’t cause the battery to deplete.

Of course, if you run heavy hydraulic actions for a long time or if accumulators are depleted, you could eventually see some drain. But the intended design is that brief or typical use in DC mode does not tax the battery.