Mercedes-Benz A-Class 2020 Operator's Manual page 263

Checking coolant level
& WARNING Risk of burns from hot com‐
ponent parts in the engine compartment
Certain components in the engine compart‐
ment can be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
Allow the engine to cool down and only
#
touch component parts described in
the following.
& WARNING Risk of scalding from hot
coolant
The engine cooling system is pressurized,
particularly when the engine is warm. If you
open the cap, you could be scalded by hot
coolant spraying out.
Let the engine cool down before open‐
#
ing the cap.
When opening the cap, wear protective
#
gloves and safety glasses.
Open the cap slowly to release pres‐
#
sure.
Park the vehicle on a level surface.
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Check the coolant temperature display in the
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instrument cluster.
The coolant temperature must be in the bot‐
tom quarter of the temperature display.
Slowly turn cap 1 counter-clockwise to
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relieve overpressure.
Maintenance and care 261
Continue turning cap 1 counter-clockwise
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and remove it.
The coolant level is correct in the following
cases:
If the engine is cold, the coolant is up to
R
marker bar 2.
If the engine is warm, the coolant is up to
R
0.6 in (1.5 cm) over marker bar 2.
If necessary, add coolant that has been
#
approved for Mercedes-Benz.
Further information on coolant
R
( page 335).
/
Adding washer fluid to the windshield
washer system
& WARNING Risk of burns from hot com‐
ponent parts in the engine compartment
Certain components in the engine compart‐
ment can be very hot, e.g. the engine, the
radiator and parts of the exhaust system.