Page 453 of 462

The engine oils are matched to the perform-
ance of Mercedes-Benz engines and service
intervals. You should therefore only use
engine oils and oil filters that are approved for
vehicles with maintenance systems.
For a list of approved engine oils and oil filters,
consult an authorized Mercedes-Benz Cen-
ter. Or visit the website
http://bevo.mercedes-benz.com.
The table shows which engine oils have been
approved for your vehicle.
Gasoline engines MB Approval
All models
229.5
Diesel engines MB Approval
GL 350 Blue-
TEC 4MATIC 228.51,
229.31,
229.51, 229.52
Mercedes-AMG vehicles: use only
SAE 0W-40 or SAE 5W-40 engine oils.
i MB approval is indicated on the oil con-
tainers.
Filling capacities
The following values refer to an oil change
including the oil filter.
Missing values were not available at time of
going to print.
Model Capacity
GL 350 Blue-
TEC 4MATIC 8.5 US qt (8.0 l)
GL 450
GL 450 4MATIC 7.4 US qt (7.0 l)
GL 550 4MATIC
9.0 US qt (8.5 l)
Mercedes ‑ AMG
vehicles Additives
! Do not use any additives in the engine oil.
This could damage the engine.
Engine oil viscosity
Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity,
this means that it is thick; a low viscosity
means that it is thin.
Select an engine oil with an SAE classification
(viscosity) suitable for the prevailing outside
temperatures. The table shows you which
SAE classifications are to be used. The low-
temperature characteristics of engine oils
can deteriorate significantly, e.g. as a result
of aging, soot and fuel deposits. It is therefore
strongly recommended that you carry out reg-
ular oil changes using an approved engine oil
with the appropriate SAE classification.
Brake fluid
G WARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.Service products and filling capacities 451
Technical data Z
Page 454 of 462

Comp ly wit h the important safety notes for
service products when han dlin g brake fluid
( Y
page 447).
The brake fluid change intervals can be found
in the Maintenance Booklet.
On ly use brake fluid appr oved by Mercedes-
Benz according to MB Approval 331.0.
In formation about approved brake fluid can
be obtained at any qualif ied specialist work-
shop or on the In ternet at
http:/ /be vo.mercedes-benz.co m.
i Have the brake fluid regularly replaced at
a qualified specialist workshop and the
replacement confirmed in the Maintenance
Booklet.
Coolant
Important safety notes
G WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB BeVo 310.1, e.g.
on the Internet at
http://bevo.mercedes-benz.com. Or con-
tact a qualified specialist workshop.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating. i Have the coolant regularly replaced at a
qualified specialist workshop and the
replacement confirmed in the Maintenance
Booklet.
Comply with the important safety precautions
for service products when handling coolant
( Y
page 447).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks: R
corrosion protection R
antifreeze protection R
raising the boiling point
If the coolant has antifreeze protection down
to -35 ‡( -37 †), the boiling point of the cool-
ant during operation is approximately 266 ‡
(130 †).
The antifreeze/corrosion inhibitor concentra
-
tio n in the engine cooling system should: R
be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †). R
not exceed 55% (antifreeze protection
down to -49 ‡ [-45 †]). Other wise, heat
will not be dissipated as effectively.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in accord-
ance with MB Specifications for Service Prod-
ucts 310.1.
i When the vehicle is first delivered, it is fil-
led with a coolant mixture that ensures
adequate antifreeze and corrosion protec-
tion.
i The coolant is checked with every main-
tenance interval at a qualified specialist
workshop.452
Service products and filling capacities
Technical data
Page 459 of 462

Vehicles with the ON&OFFROAD package:
the maximum gradient climbing ability is
100% when the LOW RANGE off-road gear is
selected.
Vehicles without the ON&OFFROAD pack-
age: the maximum gradient climbing ability is
80%.
Accelerate carefully and make sure that the
wheels do not spin when driving on steep ter-
rain.
i If the load on the front axle is reduced
when pulling away on a steep uphill slope,
the front wheels have a tendency to spin.
4ETS recognizes this and brakes the
wheels accordingly. The rear wheel torque
is increased, making it easier to drive off.
For further information about the maximum
gradient climbing ability, see ( Y
page 202).
Trailer tow hitch
Mounting dimensions
! If you have a trailer tow hitch retrofitted,
changes to the cooling system and drive
train may be necessary, depending on the
vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chas-
sis frame. C
Anchorage points for the trailer tow hitch D
Rear axle center lineTrailer tow hitch 457
Technical data Z
Page 460 of 462

Trailer loads
Trailer loads, trailer drawbar noseweights and axle loads Missing values were not available at time of going to print.
GL 450
Permissible trailer load, unbraked
Permissible trailer load, braked (at a minimum gradient-
climbing capability of 12% from a standstill) 6613 lbs (3000 kg)
Maximum drawbar noseweight (the drawbar nose-
weight is not included in the trailer load) 529 lbs (240 kg)
Permissible rear axle load when towing a trailer
3970 lbs (1800 kg)
GL 450 4MATIC, GL 550
4MATIC and GL 350 Blue-
TEC 4MATIC
Permissible trailer load, unbraked
Permissible trailer load, braked (at a minimum gradient-
climbing capability of 12% from a standstill) 7500 lbs (3402 kg)
Maximum drawbar noseweight (the drawbar nose-
weight is not included in the trailer load) 600 lbs (272 kg)
Permissible rear axle load when towing a trailer
3970 lbs (1800 kg)
GL 63 AMG 4MATIC
Permissible trailer load, unbraked
Permissible trailer load, braked (at a minimum gradient-
climbing capability of 12% from a standstill) 7165 lbs (3250 kg)
Maximum drawbar noseweight (the drawbar nose-
weight is not included in the trailer load) 309 lbs (140 kg)
Permissible rear axle load when towing a trailer
4189 lbs (1900 kg)
The actual noseweight may not be higher than the value which is given. The value can be found
on the trailer tow hitch or trailer identification plates. The lowest weight applies.
The maximum permissible trailer drawbar noseweight is the maximum weight with which the
trailer drawbar can be loaded. Limit for Mercedes-Benz-approved trailer couplings.458
Trailer tow hitch
Technical data