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Filling capacities Model Capacity
GL 350 Blue-
TEC 4MATIC Approx. 12.2 US qt
(11.5 l)
GL 450
GL 450 4MAT IC Approx. 10.3 US qt
(9.7 l)
GL 550 4MATIC
Approx. 12.0 US qt
(11.4 l)
Mercedes ‑ AMG
vehicles Approx. 13.1 US qt
(12.4 l)
Windshield washer system
Important safety notes
G WARNING
Windshield washer concentrate could ignite if
it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
! Do not add distilled or de-ionized water to
the washer fluid container. Otherwise, the
level sensor may be damaged.
! Only MB SummerFit and MB WinterFit
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
When handling washer fluid, observe the
important safety notes on service products
( Y
page 447).
At temperatures above freezing: X
Fill the washer fluid reservoir with a mixture
of water and windshield washer fluid, e.g.
MB SummerFit.
Add 1 part MB SummerFit to 100 parts water. At temperatures below freezing: X
Fill the washer fluid reservoir with a mixture
of water and washer fluid, e.g. MB Winter-
Fit.
For the correct mixing ratio refer to the
information on the antifreeze reservoir.
i Add windshield washer fluid, e.g. MB
SummerFit or MB WinterFit, to the washer
fluid all year round.
Climate control system refrigerant
Important safety notes The climate control system of your vehicle is
filled with refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
! Only the refrigerant R ‑ 134a and the PAG
oil approved by Mercedes-Benz may be
used. The approved PAG oil may not be
mixed with any other PAG oil that is not
approved for R-134a refrigerant. Other-
wise, the climate control system may be
damaged.
Service work, such as topping up refrigerant
or replacing components, may only be carried
out by a qualified specialist workshop. All
applicable regulations must be adhered to,
SAE standard J639 included.
Always have work on the climate control sys-
tem carried out at a qualified specialist work-
shop.Service products and filling capacities 453
Technical data Z

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