Mercedes-Benz G-Class, Owner'S Manual

Page: 125 / 208

Problem Possible causes/consequences and
M
Solutions
%
The preglow indicator
lamp lights up while the
engine is running.
The preglow system is malfunctioning.
X
Visit a qualified specialist workshop immediately.
#
The red battery warning
lamp lights up while the
engine is running.
The battery is not being charged. Possible causes:
R
faulty alternator
R
torn poly-V-belt
R
an electronics fault
X Stop.
X
Check the poly-V-belt.
X If it is torn: do not drive on.
X
Consult a qualified specialist workshop.
X
If it is not damaged: have the vehicle checked immediately at
a qualified specialist workshop.
#
The red battery warning
lamp lights up during or
after fording.
The poly-V-belt is wet and is slipping on the drive pulley.
X
Drive on carefully.
X
Accelerate gently.
X
Do not switch off the engine.
The poly-V-belt will dry out after fording. The red battery charge
indicator lamp goes out after 15 seconds.
+
The red coolant warn-
ing lamp comes on
while the engine is run-
ning.
The coolant level is too low.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X
Apply the parking brake.
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
warning notes (
Y
page 143).
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Drive to the nearest qualified specialist workshop.
X
Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-start driving.
Warning and indicator lamps in the instrument cluster
123
Display and display messages
Z