Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 522

520 Display messages and warning/indicator lamps
Display messages
&
inoperative Battery low
&
Inoperative Refuel vehicle
Vehicle
Display messages
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.
#
* There is too little fuel in the fuel tank. The stationary heater cannot be switched on.
Refuel the vehicle.
#
Possible causes/consequences and
* The driver display is inoperative due to a failed software update.
The display message is shown every time the engine is started.
& WARNING Risk of accident due to a driver display malfunction
If the driver display has failed or malfunctioned, the function restrictions applying to safety relevant systems are
not visible.
The operating safety of your vehicle may be impaired.
Solutions
M
Solutions
M
P223 0288 02