1999 Mercedes Benz ML 430 Synchronize Transmission Signal Of Radio Remote Control. NOTE: If it is not possible to lock or unlock the vehicle, a synchronization of the locking system can be necessary. The reading-in process must be carried out within 10 seconds . 1 Insert remote control key into ignition switch and rotate in position 2 2 Remove key and press lock button (2) and hold pressed, while simultaneously pressing the unlock button (3) five times. 3 Release buttons and then press one of the two buttons once.

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