Mercedes-Benz S-Class Operator's Manual page 462

Engine compartment
460
X
Turn cap : counterclockwise and remove
it.
X
Add engine oil.
Vehicles with oil level measurement
function in the on-board computer: observe
the information in the on-board computer
when doing so. Vehicles with oil dipstick: if
the oil level is at or below the MIN mark on
the oil dipstick,
add 0.55 to 1.1 US qt (0.5 to 1.0 l) engine
oil.
X
Replace cap : on the filler neck and turn
clockwise.
Ensure that the cap locks into place
securely.
X
Check the oil level again with the oil
dipstick ( Y page 458) or the on-board
computer ( Y
Further information on engine oil
( Y page 527).
Checking and adding other service
products
Checking the coolant level
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
X
Turn the SmartKey to position
2 ( Y
page 303) in the ignition lock.
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
X
Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
G
WARNING
In order to avoid any potentially serious burns:
use extreme caution when opening the
R
hood if there are any signs of steam or
coolant leaking from the cooling system, or
page 458).
Y page 303).
if the coolant temperature display indicates
that the coolant is overheated.
do not remove the pressure cap on the
R
coolant reservoir if the coolant temperature
is above 158 ‡ (70 †). Allow the engine to
cool down before removing the cap. The
coolant reservoir contains hot fluid and is
under pressure.
using a rag, slowly turn the cap
R
approximately
pressure. If opened immediately, scalding
hot fluid and steam will be blown out under
pressure.
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.
X
Slowly turn cap : half a turn counter-
clockwise and allow excess pressure to
escape.
X
Turn cap : further counter-clockwise and
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 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 ;.
I n f o r ma t i o n P r o v i d e d b y :
1
/ turn to relieve excess
2