Mercedes-Benz GL450 Operator's Manual page 364

Gross Axle Weight Rating (GAWR) is the
maximum permissible axle weight:
GL 450
Front 3240 lbs (1470 kg)
Rear 3965 lbs (1800 kg)
The Gross Trailer Weight (GTW) is the
weight of the trailer plus the weight of all
cargo, equipment, luggage etc. loaded on
the trailer. The maximum permissible
gross trailer weight to be towed:
7500 lbs (3405 kg).
Trailer Tongue Weight Rating (TWR) is the
maximum permissible weight on the trailer
tongue:
600 lbs (273 kg) limit for Mercedes-Benz
approved hitch receiver.
Loading a trailer
When loading a trailer, you should ob-
serve that neither the permissible GTW,
nor the GVWR are exceeded.
Maximum permissible values are listed
on the safety compliance certification
labels for the vehicle and for the trailer
to be towed.
The lowest value listed must be select-
ed when determining how the vehicle
and trailer are loaded.
The tongue weight at the hitch ball
must be added to the GVW to prevent
exceeding your Mercedes-Benz tow
vehicle's rear GAWR.
i
We recommend loading the trailer in such a
manner that it has a Tongue Weight (TW)
between 8% and 15% of the Gross Trailer Weight
(GTW).
i
Maximum trailer ratings are calculated as-
suming a base vehicle, plus any options neces-
sary to achieve the rating, plus driver. The weight
of other equipment, passengers and cargo will
reduce the maximum trailer weight your vehicle
can tow.
Driving instructions
Checking weights of vehicle and trailer
To assure that the tow vehicle and trail-
er are in compliance with the maximum
permissible weight limits have the load-
ed rig (tow vehicle including driver, pas-
sengers and cargo, trailer fully loaded)
weighed on a commercial scale.
Check the vehicle's front and rear
Gross Axle Weight (GAW), the Gross
Trailer Weight (GTW) and Tongue
Weight (TW).
The values as measures must not
exceed the weight limits listed under
"Vehicle and trailer weight and ratings"
( page 362).
Operation
363