Mercedes-Benz GL-Class, Maintenance Booklet

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7
Maintenance Booklet
Introduction
SPARK PLUGS. The Maintenance System
calls for spark plug replacement
according to the mileage at Service 12 or
5 years, whichever comes first. Severe
operating conditions (frequent starting
and stopping, excessive idling, sustained
fast highway driving) may call for spark
plugs to be replaced correspondingly
sooner.
COOLANT. Have the coolant (water/anti-
corrosion/antifreeze mixture) replaced
every 143,000 miles or 15 years, see page
63. Replacement of coolant may be re-
quired more frequently if coolant is not
maintained according to instructions
and/or other than approved anticorro-
sion/antifreeze products for your vehicle
are being used. For instructions on cool-
ant, see “Coolants” in your vehicle Opera-
tor’s Manual. For a listing of approved
anticorrosion/antifreeze products for
your vehicle, refer to the Factory Ap-
proved Service Products pamphlet, or
contact an authorized Mercedes-Benz
Light Truck Center.
Wear items - While the Maintenance
System calls for inspection of certain wear
items, the system does not make any
judgment on the condition of these wear
items. Only a qualified technician can
determine if a wear item needs to be
replaced.
Engine oils and oil filters are specifically
tested for their suitability in our engines
and durability for our service intervals.
Therefore, only use approved engine oils
and oil filters required for vehicles with
Maintenance System. For a listing of
approved engine oils and oil filters, refer
to the Factory Approved Service products
pamphlet, or contact an authorized
Mercedes-Benz Light Truck Center.
Using engine oils and oil filters of
specification other than those expressly
required for the Maintenance System or
changing of oil and oil filter at change
intervals longer than those called for by
the Maintenance System will result in
engine damage not covered by the
Mercedes-Benz Limited Warranty
.