Mercedes-Benz R 350 Operator's Manual page 290

Replace cap : on the filler neck and turn
X
clockwise.
Ensure that the cap locks into place
securely.
Check the oil level again with the oil
X
dipstick ( page 286).
Y
For further information on engine oil, see
( page 354).
Y
Additional service products
Checking the coolant level
G
WARNING
In order to avoid potentially serious burns:
use extreme caution when opening the
R
hood if there are any signs of vapor or
coolant leaking from the cooling system, or
if the coolant temperature display indicates
that the coolant is overheated.
do not remove the pressure cap on the
R
coolant tank if the coolant temperature is
above 158 ‡ (70 †). Allow the engine to
cool down before removing the cap. The
coolant tank contains hot fluid and is under
pressure.
using a cloth, slowly turn the cap
R
approximately Ö turn to relieve excess
pressure. If you open the cap immediately,
pressurized scalding hot fluid and vapor will
be blown out.
do not spill antifreeze on hot engine parts.
R
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts.
Engine compartment
Park the vehicle on a level surface.
X
Only check the coolant level when the
vehicle is on a level surface and the engine
has cooled down.
Turn the SmartKey to position 2 in the
X
ignition lock ( page 149).
Y
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Check the coolant temperature gauge in
X
the multifunction display.
The coolant temperature must be below
158 ‡ (70 †).
Turn the SmartKey to position
X
0 ( page 149) in the ignition lock.
Y
Slowly turn cap : half a turn counter-
X
clockwise to allow excess pressure to
escape.
Turn cap : further counter-clockwise and
X
remove it.
If the coolant is at the level of marker bar
= in the filler neck when cold, there is
enough coolant in coolant expansion
tank ;.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar = in the filler
neck when warm, there is enough coolant
in coolant expansion tank ;.
If necessary, add coolant that has been
X
tested and approved by Mercedes-Benz.
Replace cap : and turn it clockwise as far
X
as it will go.
For further information on coolant, see
( page 355).
Y
287
page 149).
Y
Z