GT1 Self-contained diagnosis computer for the workshop, reception and final inspection, reading out can be used in connection with all model series. It replaces the MoDiC III diagnostic tester fault code memories of vehicle systems with self-diagnosis capabilities, for encoding/programming control units directly on the vehicle. The new Group Tester One satisfies the more demanding customer requirements with regard to speed, integration in existing networks and reliability. The Group can be used in connection with all model series. It replaces the MoDiC III diagnostic tester introduced in 1998 (service data and new diagnosis data have been available for this tester since July20 2002). Besides its introduction in the passenger vehicle dealership network, by 2005 the basic Group Tester One unit will also replace the MoDiTeC diagnostic tester used at BM Motorrad.