Launch x431 xprog3 giii immo programmer mcu3 adapter board kit which is compatible with X-431 PRO V4.0, X-431 PRO 3 V4.0, X-431 PRO 5, X-431 PAD III V2.0, X-431 PAD V, X-431 PAD VII, X431 V, X431 V+, X431 PRO3S+
To program all keys lost for Mercedes with X431 V, X431 V+, Pro5, Pros, Pro3S, X431 PAD V, PAD VII and X-PROG3 GIII, you will need to connect the MCU3 adapter to X-PROG3 correctly.