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 gauge in the multifunction display.
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.
See also:
Checking tire pressures manually
To determine and set the correct tire
pressure, proceed as follows:
– Remove the valve cap of the tire that is to
be checked.
– Press the tire pressure gauge securely onto
the valve.
– Read t ...
Resetting to factory settings
For safety reasons, the Daytime Running
Lamps function in the Lighting submenu is
only reset when the engine is switched off.
► Press
on the steering wheel
to select the Settings menu.
...
Front fog lamps and rear fog lamp
Front fog lamps
Only vehicles with front fog lamps have the
"fog lamps" function.
WARNING
If you suspect that driving conditions will be
foggy, turn the light switch to
b ...