Mercedes-Benz B-Class Owner's Manual page 490

W W ar arning/indicat ning/indicator lamp or lamp
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Electrical fault warning lamp
æ
Fuel reserve warning lamp
lights up
Possible causes/conseq P ossible causes/consequences and uences and
* The red electrical fault warning lamp is lit.
There is a fault in the electrics.
Note the messages on the instrument display.
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* The yellow fuel reserve warning lamp lights up while the engine is running.
The fuel supply has dropped into the reserve range.
Refuel.
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M M Solutions Solutions
Display messages and warning/indicator lamps 487
487