Launch MCU3 Adapter is used to Mercedes-Benz all keys lost and ECU TCU readingWork with XPROG3/GIII, which is compatible with X431 PRO, X431 PRO 3, X431 PRO 5, X431 PAD III, X431 PAD V, X431 PAD VII, X431 V, X431 V+, X431 PRO 3S+.