Becker Mexico, Grand Prix, Europa & Avus Models (SL Class)

Turn ignition on. Turn radio on. CODE will be displayed on radio. Enter 3-digit customer supplied code number by turning tuning knob to right until first digit is correctly displayed. Press AUTOMATIC button moving display to next digit. Confirm correct code is displayed by pressing AUTOMATIC button. Radio will turn on if correct code is entered.

If wrong code is entered, CODE will be displayed on radio. If wrong code is entered 3 times, WAIT will be displayed and code entry is denied for 15 minutes. Radio and ignition switch must remain on during the waiting period. If wrong code is entered 9 times, "_ _ _ _" will be displayed, radio is no longer operational, and must be returned to manufacturer for reactivation.