Press and hold the SET or CLK button until the digits flash, then use the volume knob or tuning buttons to adjust hours and minutes. Audio Settings
Many 815-series units require a 4-digit security code if the battery is disconnected. This code is usually found on the original "Radio Passport" card. blaupunkt gmbh 815 manual
Let me know if you'd like me to change anything. Press and hold the SET or CLK button