Checking the coolant level
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 ignition lock.
On vehicles with KEYLESS-GO, press the
Start/Stop button twice.
Check the coolant temperature
display in
the instrument cluster.
The coolant temperature must be below
158 °F (70 °C).
WARNING
In order to avoid any potentially serious burns:
• use extreme caution when opening the
hood if there are any signs of steam 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
coolant reservoir if the coolant temperature
is above 158 °F (70 °C). 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
approximately 1/2 turn to relieve excess
pressure. If opened immediately, scalding
hot fluid and steam will be blown out under
pressure.
• do not spill antifreeze on hot engine parts. Antifreeze contains ethylene
glycol which
may burn if it comes into contact with hot
engine parts.
Slowly turn cap 1 half a turn
counterclockwise
and allow excess pressure to
escape.
Turn cap 1 further
counter-clockwise and
remove it.
If the coolant is at the level of marker bar
3 in the filler neck when cold, there is
enough coolant in coolant expansion
tank 2.
If the coolant is approximately 0.6 in
(1.5 cm) above marker bar 3 in the filler
neck when warm, there is enough coolant
in coolant expansion tank 2.
If necessary, add coolant that has
been
tested and approved by Mercedes-Benz.
Replace cap 1 and turn it clockwise
as far
as it will go.
For further information on coolant.
See also:
DEF
Important notes on use
To function properly, BlueTEC exhaust gas
aftertreatment must be operated with the
reducing agent DEF. Adding DEF is one of the
tasks performed during maintenance. Under
no ...
EBD (electronic brake force distribution)
Observe the "Important safety notes"
section.
EBD monitors and controls the brake
pressure on the rear wheels to improve
driving stability while braking.
WARNING
If EBD has malfu ...
Fuse box on the left in the direction of
travel
Open the hood.
Remove any existing moisture from the
fuse box using a dry cloth.
AMG vehicles: remove the control unit
above the fuse box.
To open: undo screws 1 with an Allen
key.
...