Erase DTC Memory (Function 05): Requirement
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Volkswagen EuroVan, 2002 Volkswagen EuroVan, 2001 Volkswagen EuroVan, 2000 Volkswagen EuroVan, and 1999 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
DTC memory checked. See CHECK DTC MEMORY (FUNCTION 02) under ON BOARD DIAGNOSTIC (OBD), INITIATING.