PREVOST X3-45 COACH 2018 Operator's Manual page 164

7-16 Safety Features and Equipment
CAUTION
The following directives must be followed.
 Never connect a battery charger when the
ignition is at the ON position on a vehicle
with a CAN defective or certain functions
will start up by themselves,
 Disconnect the charger before starting the
vehicle, if not the default functions will not
activate,
 If the default mode does not activate, try to
turn the ignition OFF while ensuring that
no charger is connected and then restart
the vehicle.
PA1627 X3-45 Operator's Manual