Fuel Leaks: AKF Engine Documentation (Solution)

3.3L 8-cylinder TDI engine, AKF engine type, up to serial number 4D 1N 008 935.
Fuel leakage, fuel smell inside the vehicle.
Leakage in the area of the transmission bellhousing.

Cause:
Leaks in the high-pressure area of the common rail system. 1. Leak at the sealing screw on the rail.
2. Fuel injection lines are leaking at the fittings.
3. High-pressure pump.

Procedure:
Fuel leaks in the rail system usually occur in the area of the sealing screw (Torx screw). If the rail elements are leaking, they must be replaced.
2. Replace leaky fuel lines and tighten them with a torque of 25 Nm.
"Leaks in the high-pressure pump are usually found in the area of the connections and manifest as fuel leaking into the engine compartment. If the high-pressure pump is leaking, it must be replaced."

Sure, here is the translation of the text from German to English:

"Note:"
"Often, these leaks do not occur at idle because the rail pressure is too low. In this case, please spray the suspected parts with a leak detection spray and perform a test drive under full load. Leaks from the fuel rail or from the injector lines, which are located in the rear of the engine compartment, can cause..."
Fuel leaks from the engine, enters the transmission housing, and then leaks out again.
This looks like there might be a leak coming from the transmission.