Mercedes-Benz S-Class Saloon 2021 Owner's Manual page 572

W W ar arning/indicat ning/indicator lamp or lamp
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Coolant warning lamp (yel-
low)
Possible causes/conseq P ossible causes/consequences and uences and
Note the messages on the driver display.
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If the coolant t If t he coolant tem emper peratur ature displa e display is at t
Consult a quali ed specialist workshop.
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If t If the coolant t he coolant tem emper peratur ature displa e display is at t
Exit the vehicle and keep a safe distance from it until the engine has cooled down.
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Make sure that the air supply to the radiator is not obstructed.
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Avoiding high loads on the engine, drive to the nearest quali ed specialist workshop. In doing so, ensure that the
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coolant temperature display remains below 120°C.
* The yellow coolant warning lamp is lit while the engine is running.
Possible causes:
The temperature sensor is malfunctioning
R
The charge air, transmission oil or battery cooling is faulty
R
The radiator shutters are blocked or defective
R
Avoiding high loads on the engine, drive to the nearest quali ed specialist workshop.
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M M Solutions Solutions
y is at the low he lower end of t er end of the t he tem emper peratur
y is at the upper end of t he upper end of the t he tem emper
Display messages and warning/indicator lamps 569
ature scale: e scale:
peratur ature scale: e scale:
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