Meinst Du das stinknormale Clarion Bluetooth-Radio mit CD-Laufwerk (NICHT das Connect von Bosch)?
https://www.ebay.de/i/331993334271
Da kann man die Uhrzeit problemlos aktivieren (habe ich auch - erscheint dann zusätzlich im Radiobetrieb):
Clock setting:
Push the SETUP buton to enter the setup menu
screen and then select “Clock”.
Turn the TUNE/MENU/ENTER dial, the mode will
change as follows:
Set Time⇔ON/OFF⇔Clock Format⇔Set Time
Set Time:
Select “Set Time” then adjust the clock as follows:
The hour display will start flashing. Turn the TUNE/
MENU/ENTER dial to adjust the hour and push the
TUNE/MENU/ENTER dial. The minute display will
start flashing. Turn the TUNE/MENU/ENTER dial to
adjust the minute and push the TUNE/MENU/
ENTER dial to finish the clock adjustment.
ON/OFF:
Set the clock display to on or off when the audio unit
is turned off. If set in the ON position, the clock will
be displayed when the audio unit is turned off either
by pushing the power/VOL dial or when the ignition
switch is placed in the “OFF” position.
Clock Format:
Switch the clock display between 24-hour and 12-
hour clock mode.