When "SAFE" or "CODE" appears on the display, you must input a 4-digit PIN to reactivate it. If you do not have the original manual, a is the most effective way to recover it, often using only the unit’s unique serial number. How to Find Your Blaupunkt RCD 310 Serial Number
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The RCD 310 has a security feature that can be frustrating if you don't know how it works. If you enter an incorrect code twice, your radio will enter a temporary lockdown. You will see on the display. Here’s what to do: blaupunkt rcd 310 code calculator 2021
If your screen shows "SAFE" with a small number "2" in the corner, the radio is in a temporary lockdown mode because someone entered the wrong code twice. When "SAFE" or "CODE" appears on the display,