Mercedes-Benz E-Class Saloon Owner's Manual page 521

Display messages Possible causes/consequences and
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* The battery is no longer being charged and the battery charge level is too low.
Stop vehicle See Owner's
Manual
* The charge level of the 48 V battery is too low. You can no longer start the engine.
Cannot start engine See
Owner's Manual
* The 48 V battery has been charged automatically via the voltage converter.
Motor can be started again
* The fan motor is defective.
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* NOTE Possible engine damage if you continue driving
Do not continue driving under any circumstances.
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Consult a qualified specialist workshop.
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Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not
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continue driving under any circumstances.
Switch off the engine.
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Consult a qualified specialist workshop.
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Switch off electrical consumers that are not required.
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Connect a suitable charger approved by Mercedes-Benz with sufficient charge output to the jump-start connec‐
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tion point of the 12 V battery (
/
The 48 V battery is charged via the voltage converter in the vehicle.
Start the engine and drive the vehicle for a while to charge the 12 V battery and the 48 V battery.
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Display messages and warning/indicator lamps 519
M M Solutions
page 444).