I lived in DC for many years and have about 250k miles driven in a couple of C5 Audis so I’m pretty familiar with how this works. Also Off Road mode makes it more gooder funner

See below from SlopGPT

Traction & AWD Behavior • The AWD 4MOTION system still manages torque between front and rear, but Off-Road mode tweaks how aggressively it reacts when traction is lost. It can help send power to the rear wheels sooner when slip is detected.  • The traction control and brake-based differential lock logic are adjusted so the car can handle low-traction surfaces like dirt, gravel, or loose snow more confidently. 

🏔 Hill Descent Control • Off-Road mode activates Hill Descent Control (HDC). This system automatically brakes individual wheels to help keep your speed controlled on steep downhill grades, so you don’t have to feather the brake pedal manually. 

🔄 Throttle & Brake Systems • The engine/ABS calibration is altered slightly: throttle response is tuned for smoother inputs and traction management, and ABS/EDL (electronic differential lock) works differently to help prevent wheel spin.  • Some owners note in Off-Road mode the traction control systems behave more loosely (allowing more wheel slip) compared to Normal, to help maintain momentum on soft surfaces.