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Checking the 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 pressurised,
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.
#
Check the coolant temperature display in the
#
instrument cluster.
The coolant temperature must be below
70 °C.
Slowly turn cap
1
anti-clockwise to release
#
overpressure.
Maintenance and care 253
Continue turning cap
1
anti-clockwise 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
1.5 cm over the marker bar 2.
If necessary, top up with coolant that has
#
been approved for Mercedes-Benz.
Further information on coolant
R
(
page 312).
/
Topping up the windscreen 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.
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