Mercedes-Benz S-Class 2020 Operator's Manual page 553

Driving safety systems
Warning/indicator lamp
Possible causes/consequences and
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The yellow ABS warning lamp is lit while the engine is running.
*ABS is malfunctioning.
If there is an additional warning tone, EBD is malfunctioning.
ABS warning lamp
Other driving systems and driving safety systems may also be malfunctioning.
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& WARNING There is a risk of skidding if EBD or ABS is malfunctioning
If EBD or ABS is malfunctioning, the wheels may lock when braking.
The steering capability and braking characteristics are thus severely impaired. The braking distance in an emer‐
gency braking situation can increase. In addition, other driving safety systems are switched off.
Drive on carefully.
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Have the brake system checked immediately at a qualified specialist workshop.
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Drive on carefully.
Note the messages on the multifunction display.
Visit a qualified specialist workshop.
Display messages and warning/indicator lamps 551
M M Solutions