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10 Maintenance and service
10
356
Measuring the oil level, 5-cyl. diesel
If the oil level needs to be checked then it
should be carried out in accordance with the
following sequence.
1. Activate key position II; see Key positions
- functions at different levels (p. 82).
2. Rotate the thumbwheel on the left-hand
stalk switch to position
Oil level.
> You will then see information displayed
about the engine oil level.
For more information on menu naviga-
tion, see Menu navigation - combined
instrument panel (p. 112).
The figures 1-4 represent filling level. Do not fill
more oil if filling level (3) or (4) is shown. Recom-
mended filling level is 4. Message and graphic in
the display.
Related information
•
Engine oil - general (p. 354)
Coolant - level
The coolant cools the internal combustion
engine to the correct operating temperature.
The heat that is transferred from the engine to
the coolant can be used to heat the passen-
ger compartment.
The coolant level must lie between the MIN
and MAX marks on the expansion tank.
Checking the level and topping up
When topping up the coolant, follow the
instructions on the packaging. Never top up
with water only. The risk of freezing increases
with both too little and too much coolant con-
centrate.
WARNING
Coolant can be very hot. If the coolant
requires topping up when the engine is at
operating temperature, unscrew the
expansion tank cap slowly to gently
release the overpressure.
For capacities and for standards regarding
water quality; see Coolant - grade and vol-
ume (p. 405).
Check the coolant regularly
The level must be between the MIN and MAX
marks on the expansion tank. If the system is
not filled sufficiently, high temperatures could
occur, causing a risk of damage to the
engine.
