Mercedes-Benz B-Class hatchback 2022 Owner's Manual page 428

Display messages
PRE-SAFE inoperative See
Owner's Manual
Key
Display messages
Á
Replace key
Á
Change key batteries
Possible causes/consequences and
* The PRE‑SAFE ®
functions are malfunctioning.
Consult a qualified specialist workshop.
#
Possible causes/consequences and
* Have the key replaced.
Consult a qualified specialist workshop.
#
* The key battery is discharged.
Replace the battery (
/
#
Solutions
M
Solutions
M
page 85).
Display messages and warning/indicator lamps 425