One problem related to auxillary tank has been reported for the 2008 Volkswagen R32. The most recently reported issues are listed below.
The contact owns a 2008 Volkswagen R32. The contact stated that the vehicle would jerk and the gas tank ventilation valve allowed gasoline to escape from the gas tank. The malfunction indicator lamp on the instrument panel would illuminate and fuel would leak from the evaporative system. The VIN was not included in NHTSA campaign id number 09v093000 (fuel system, gasoline:storage:tank assembly). The failure mileage was 10,000.