Mercedes-Benz R-Class Owner's Manual page 226

H Environmental note
When topping up the oil, take care not to
spill any. Oil must not be allowed to escape
into the soil or waterways. You would oth-
erwise be damaging the environment.
Coolant
G Risk of injury
The cooling system is pressurised. There-
fore, only unscrew the cap once the engine
has cooled down. The coolant temperature
gauge must display less than 70 °C. You
could otherwise be scalded by escaping hot
coolant.
Coolant consists of water and antifreeze/cor-
rosion inhibitor. Only check the coolant level
when the vehicle is on a level surface and the
engine has cooled down.
* optional
Checking the coolant level
The expansion tank is located in the engine
compartment on the right-hand side of the
vehicle when viewed in the direction of travel.
Cap
1
Expansion tank
2
Marker bar
3
Slowly turn cap 1 by half a turn anti-clock-
X
wise to allow excess pressure to escape.
Turn cap 1 further anti-clockwise and
X
remove it.
There is sufficient coolant in expansion
tank 2 if the coolant is level with the
marker bar 3 in the filler neck when cold
or approximately 1.5 cm higher when hot.
Engine compartment
Top up the coolant if necessary.
X
Replace cap 1 and tighten all the way to
X
the stop.
You will find further information about coolant
in the "Technical data" section
( page 360).
Y
Windscreen washer system/head-
lamp cleaning system*
The washer fluid reservoir is located in the
engine compartment on the right when
viewed in the direction of travel. The head-
lamp cleaning system is also supplied from
the washer fluid reservoir.
Cap
1
Washer fluid reservoir
2
Operation
Z
223