Mercedes-Benz 2015 GLK, Operator'S Manual

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! If the coolant temperature exceeds 248 ‡(120 †) do not continue driving. The engine will
otherwise be damaged.
Display messages Possible causes/consequences and
M
Solutions
?
The engine fan is defective.
X
At coolant temperatures under 248 ‡ (120 † ), drive to the next
qualified specialist workshop.
X
Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
#
The battery is not being charged.
Possible causes are:
R
a defective alternator
R
a torn poly-V-belt
R
a malfunction in the electronics
X
Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X
Open the hood.
X
Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X
Consult a qualified specialist workshop.
If the poly-V-belt is not damaged:
X
Visit a qualified specialist workshop.
4
Check Engine Oil
At Next Refueling
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
X
Check the engine oil level at the latest when next refueling
(
Y
page 239).
X
If necessary, add engine oil (
Y
page 239).
X
If engine oil needs to be added more often than usual, have the
engine checked at a qualified specialist workshop.
Information on approved engine oils can be obtained from any qualified specialist workshop
or on the Internet at http://www.mbusa.com (USA only).
! The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of
engine damage.
The display messages and the corresponding symbol that indicate that the oil level is too
low must not be ignored.
Display messages
193
On-board computer and displays
Z