Mercedes-Benz GLC 200 4MATIC Owner's Manual page 473

470 Display messages and warning/indicator lamps
Display messages
&
Currently unavailable Bat-
tery low
&
Currently unavailable Refuel
&
Currently unavailable High-
voltage battery charging
incomplete.
Possible causes/consequences and
* The on-board electrical system voltage is too low.
The stationary heater has switched itself off.
Drive an extended distance until the battery has reached a sufficient charge level again.
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* There is too little fuel in the fuel tank. The stationary heater cannot be switched on.
Refuel the vehicle.
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* The high-voltage battery is charging. Pre-entry climate control cannot be switched on.
Wait until the charging process has achieved a minimum state of charge.
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Solutions
M